201
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Chavarin CA, Hardt E, Gruessing S, Skibitzki O, Costina I, Spirito D, Seifert W, Klesse W, Manganelli CL, You C, Flesch J, Piehler J, Missori M, Baldassarre L, Witzigmann B, Capellini G. n-type Ge/Si antennas for THz sensing. OPTICS EXPRESS 2021; 29:7680-7689. [PMID: 33726264 DOI: 10.1364/oe.418382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 02/10/2021] [Indexed: 06/12/2023]
Abstract
Ge-on-Si plasmonics holds the promise for compact and low-cost solutions in the manipulation of THz radiation. We discuss here the plasmonic properties of doped Ge bow-tie antennas made with a low-point cost CMOS mainstream technology. These antennas display resonances between 500 and 700 GHz, probed by THz time domain spectroscopy. We show surface functionalization of the antennas with a thin layer of α-lipoic acid that red-shifts the antenna resonances by about 20 GHz. Moreover, we show that antennas protected with a silicon nitride cap layer exhibit a comparable red-shift when covered with the biolayer. This suggests that the electromagnetic fields at the hotspot extend well beyond the cap layer, enabling the possibility to use the antennas with an improved protection of the plasmonic material in conjunction with microfluidics.
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202
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Xuan Z, Li J, Liu Q, Yi F, Wang S, Lu W. Artificial Structural Colors and Applications. Innovation (N Y) 2021; 2:100081. [PMID: 34557736 PMCID: PMC8454771 DOI: 10.1016/j.xinn.2021.100081] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Accepted: 01/13/2021] [Indexed: 10/25/2022] Open
Abstract
Structural colors are colors generated by the interaction between incident light and nanostructures. Structural colors have been studied for decades due to their promising advantages of long-term stability and environmentally friendly properties compared with conventional pigments and dyes. Previous studies have demonstrated many artificial structural colors inspired by naturally generated colors from plants and animals. Moreover, many strategies consisting of different principles have been reported to achieve dynamically tunable structural colors. Furthermore, the artificial structural colors can have multiple functions besides decoration, such as absorbing solar energy, anti-counterfeiting, and information encryption. In the present work, we reviewed the typical artificial structural colors generated by multilayer films, photonic crystals, and metasurfaces according to the type of structures, and discussed the approaches to achieve dynamically tunable structural colors.
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Affiliation(s)
- Zhiyi Xuan
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China.,Shanghai Engineering Research Center of Energy-saving Coatings, Shanghai 200083, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Junyu Li
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Qingquan Liu
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China.,Shanghai Engineering Research Center of Energy-saving Coatings, Shanghai 200083, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Fei Yi
- School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Shaowei Wang
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China.,Shanghai Engineering Research Center of Energy-saving Coatings, Shanghai 200083, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
| | - Wei Lu
- State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China.,Shanghai Engineering Research Center of Energy-saving Coatings, Shanghai 200083, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.,Shanghai Research Center for Quantum Sciences, Shanghai 201315, China
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203
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Wang J, Wu Z, Wei J, Hu J, Yu H, Su G, Hu L, Yan X, Zhan P, Liu F. Improving Aluminum Ultraviolet Plasmonic Activity through a 1 nm ta-C Film. ACS APPLIED MATERIALS & INTERFACES 2021; 13:7672-7679. [PMID: 33512139 DOI: 10.1021/acsami.0c18473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Aluminum (Al) can actively support plasmonic response in the ultraviolet (UV) range compared to noble metals (e.g., Au, Ag) and thus has broad applications including UV sensing, displays, and photovoltaics. High-quality Al films with no oxidation are essential and critical in these applications. However, Al is very prone to fast oxidation in air, which critically depends on the fabrication process. Here, we report that by leveraging the in situ sputter etching and sputter deposition of a 1 nm tetrahedral amorphous carbon (ta-C) film on the Al nanostructures, Al plasmonic activity can be improved. The prior sputter etching process greatly reduces the oxidized layer of the Al films, and the subsequent sputter deposition of ta-C keeps Al oxidation-free. The ta-C film outperforms the naturally passivated Al2O3 layer on the Al film because the ta-C film has a denser structure, higher permittivity, and better biocompatibility. Therefore, it can effectively improve the plasmonic response of Al and be beneficial to molecule sensing, which is proved in our experiments and is also verified in simulations. Our results can enable the various applications based on plasmon resonance in the UV range.
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Affiliation(s)
- Jie Wang
- Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, P. R. China
| | - Zhenqiu Wu
- Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, P. R. China
| | - Junhan Wei
- Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, P. R. China
| | - Junzheng Hu
- Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, P. R. China
| | - Huikang Yu
- Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, P. R. China
| | - Guangxu Su
- School of Physics, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. China
| | - Lumang Hu
- School of Physics, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. China
| | - Xiaodong Yan
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, California 90089, United States
| | - Peng Zhan
- School of Physics, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. China
| | - Fanxin Liu
- Department of Applied Physics, Zhejiang University of Technology, Hangzhou 310023, P. R. China
- School of Physics, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, P. R. China
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204
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Zdanowicz M, Mroczyński R, Szczepański P. Strong second-harmonic response from semiconductor-dielectric interfaces. APPLIED OPTICS 2021; 60:1132-1136. [PMID: 33690561 DOI: 10.1364/ao.414255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 01/04/2021] [Indexed: 06/12/2023]
Abstract
In this study, an analysis of the second-harmonic generation (SHG) response from surfaces containing dielectric-semiconductor interfaces with sub-wavelength features is presented. The investigated medium is a metamaterial where the SHG response is governed by the symmetry breaking between consecutive layers. The examined material is composed of a periodic structure based on 50 nm silicon nitride and 10 nm indium gallium zinc oxide (IGZO) fabricated on a quartz glass substrate. The elementary cell consists of a pair of materials in an exchangeable order. The preliminary results show a promising application of the amorphous IGZO as a nonlinear optical material, whose optical characteristics can be controlled by the fabrication process itself. Prepared structures give a remarkably high SHG response. For an effective thickness of the structure equal to 240 nm, a more than 250-fold increase in SHG compared to the reference substrate is observed.
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205
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Heßler A, Wahl S, Leuteritz T, Antonopoulos A, Stergianou C, Schön CF, Naumann L, Eicker N, Lewin M, Maß TWW, Wuttig M, Linden S, Taubner T. In 3SbTe 2 as a programmable nanophotonics material platform for the infrared. Nat Commun 2021; 12:924. [PMID: 33568636 PMCID: PMC7876017 DOI: 10.1038/s41467-021-21175-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 01/13/2021] [Indexed: 11/24/2022] Open
Abstract
The high dielectric optical contrast between the amorphous and crystalline structural phases of non-volatile phase-change materials (PCMs) provides a promising route towards tuneable nanophotonic devices. Here, we employ the next-generation PCM In3SbTe2 (IST) whose optical properties change from dielectric to metallic upon crystallization in the whole infrared spectral range. This distinguishes IST as a switchable infrared plasmonic PCM and enables a programmable nanophotonics material platform. We show how resonant metallic nanostructures can be directly written, modified and erased on and below the meta-atom level in an IST thin film by a pulsed switching laser, facilitating direct laser writing lithography without need for cumbersome multi-step nanofabrication. With this technology, we demonstrate large resonance shifts of nanoantennas of more than 4 µm, a tuneable mid-infrared absorber with nearly 90% absorptance as well as screening and nanoscale “soldering” of metallic nanoantennas. Our concepts can empower improved designs of programmable nanophotonic devices for telecommunications, (bio)sensing and infrared optics, e.g. programmable infrared detectors, emitters and reconfigurable holograms. Here, the authors introduce In3SbTe2 (IST) as a programmable material platform for plasmonics and nanophotonics in the infrared. They demonstrate direct optical writing, modifying and erasing of metallic crystalline IST nanoantennas, tuning their resonances, as well as nanoscale screening and soldering.
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Affiliation(s)
- Andreas Heßler
- Institute of Physics (IA), RWTH Aachen University, Aachen, Germany.
| | - Sophia Wahl
- Institute of Physics (IA), RWTH Aachen University, Aachen, Germany
| | - Till Leuteritz
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | | | | | | | - Lukas Naumann
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | - Niklas Eicker
- Institute of Physics (IA), RWTH Aachen University, Aachen, Germany
| | - Martin Lewin
- Institute of Physics (IA), RWTH Aachen University, Aachen, Germany
| | - Tobias W W Maß
- Institute of Physics (IA), RWTH Aachen University, Aachen, Germany
| | - Matthias Wuttig
- Institute of Physics (IA), RWTH Aachen University, Aachen, Germany
| | - Stefan Linden
- Physikalisches Institut, University of Bonn, Bonn, Germany
| | - Thomas Taubner
- Institute of Physics (IA), RWTH Aachen University, Aachen, Germany.
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206
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Qiu X, Shi J, Li Y, Zhang F. All-dielectric multifunctional transmittance-tunable metasurfaces based on guided-mode resonance and ENZ effect. NANOTECHNOLOGY 2021; 32:065202. [PMID: 33091894 DOI: 10.1088/1361-6528/abc3e5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Electrically tunable metasurfaces open new doors for manipulating the phase, amplitude and polarization of light in ultrathin layers. Compared with metal assisted metasurfaces, all-dielectric transmission metasurfaces-with outstanding feature of low loss, especially incorporating with new electro-optical materials-show great potential for the next generation flat optics. In this study, by combining the epsilon-near-zero effect in indium tin oxide (ITO) with guided-mode resonance, we propose novel electrically tunable all-dielectric metasurface architectures with versatile functions for widespread potential application. The inserted periodic ITO and hafnium oxide layers sandwiched in silicon act as two metal-oxide-semiconductor capacitors in a single period to disturb the resonance wavelength in the near-infrared spectral range under the voltage applied. For the one-dimensional structure, the transmittances of this metasurface at 1512 and 1510 nm change 20 and -14 dB under 0∼5 V bias voltage, respectively. In addition, the bilayer structure performs well in double-waveband applications, indicating that more layers can support more operation wavebands. Meanwhile, the two-dimensional structure works as a polarization insensitive device when setting the same structural parameters in both orthogonal directions. The proposed architecture, with various merits including ultra-compact size, high-speed and complementary metal-oxide-semiconductor compatibility, provides a multifunctional and multi-degree-of-freedom design, as well as enormous potential applications in more complicated flat optics.
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Affiliation(s)
- Xiaoming Qiu
- State Key Laboratory of Advanced Optical Communication System and Networks, Frontiers Science Center for Nano-optoelectronics, Department of Electronics, Peking University, Beijing 100871, People's Republic of China
| | - Jian Shi
- State Key Laboratory of Advanced Optical Communication System and Networks, Frontiers Science Center for Nano-optoelectronics, Department of Electronics, Peking University, Beijing 100871, People's Republic of China
| | - Yanping Li
- State Key Laboratory of Advanced Optical Communication System and Networks, Frontiers Science Center for Nano-optoelectronics, Department of Electronics, Peking University, Beijing 100871, People's Republic of China
| | - Fan Zhang
- State Key Laboratory of Advanced Optical Communication System and Networks, Frontiers Science Center for Nano-optoelectronics, Department of Electronics, Peking University, Beijing 100871, People's Republic of China
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207
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He X, Liu F, Lin F, Shi W. Tunable 3D Dirac-semimetals supported mid-IR hybrid plasmonic waveguides. OPTICS LETTERS 2021; 46:472-475. [PMID: 33528387 DOI: 10.1364/ol.415187] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 12/21/2020] [Indexed: 06/12/2023]
Abstract
Based on 3D Dirac-semimetal (DSM) modified hybrid waveguides, tunable propagation properties have been investigated, including the effects of Fermi levels, structural parameters, and operation frequency. The results show that if the operation frequency is smaller (larger) than the transition frequency (ℏω≈2|μc|), the proposed hybrid waveguides indicate strong (weak) confinement because the DSM layer manifests a high plasmonic (dielectric low) loss property. The dielectric fiber shape affects the propagation property obviously, as the elliptical parameter decreases, the confinement and figure of merit increase, and the loss reduces. With the increase in Fermi level, the propagation constant increases, and the frequency (amplitude) modulation depth is 32.31% (12.93%) if the Fermi level changes in the range of 0.01-0.15 eV. The results are very helpful in understanding the tunable mechanisms of hybrid waveguides and designing novel plasmonic devices in the future, e.g., modulators, filters, lasers, and resonators.
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208
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Affiliation(s)
- Jinxing Chen
- Department of Chemistry University of California Riverside CA 92521 USA
- Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft Materials (FUNSOM) Soochow University Suzhou Jiangsu 215123 P. R. China
| | - Zuyang Ye
- Department of Chemistry University of California Riverside CA 92521 USA
| | - Fan Yang
- Department of Chemistry University of California Riverside CA 92521 USA
| | - Yadong Yin
- Department of Chemistry University of California Riverside CA 92521 USA
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209
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Zhang D, Cui H, Zhu C, Lv K, Zhang H, Liu X, Qiu J. Nanoscale Engineering of Optical nonlinearity Based on a Metal Nitride/Oxide Heterostructure. ACS APPLIED MATERIALS & INTERFACES 2021; 13:1253-1260. [PMID: 33356088 DOI: 10.1021/acsami.0c18431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The abilities to modulate linear and nonlinear optical response of materials in the nanoscale are of central importance in the design and fabrication of photonic devices for applications like optical modulators. Here, based on a simple transition metal oxide/nitride (TiO2/TiN) system, we show that it is possible to tune the optical properties by controlling the nanoscale architecture. Through controlled oxidation of the plasmonic TiN nanoparticle surfaces, we observe a continuous change of linear and nonlinear optical (NLO) properties with the increase of the thickness of the oxide layer in the TiN/TiO2 heterogeneous architecture. The NLO response is manifested by the strong saturable absorption with a structurally tunable negative NLO absorption coefficient. The variation in the NLO absorption coefficient by up to 7-fold can be connected to the relative change in the volume fraction of the metallic core and the dielectric shell. We demonstrate further that the optimized TiN-TiO2 heterostructures can be used to drive an optical switch for pulse laser generation in the 1.5 μm wavelength region. Our results delineate a topochemical process for optimization of the NLO properties of common plasmonic materials for photonic applications based on simple materials chemistry.
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Affiliation(s)
- Duoduo Zhang
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Hao Cui
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Chenyang Zhu
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Kefan Lv
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Haoran Zhang
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xiaofeng Liu
- School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jianrong Qiu
- College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
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210
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Yao Y, Zhou J, Liu Z, Liu X, Fu G, Liu G. Refractory materials and plasmonics based perfect absorbers. NANOTECHNOLOGY 2021; 32:132002. [PMID: 33302265 DOI: 10.1088/1361-6528/abd275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 12/10/2020] [Indexed: 06/12/2023]
Abstract
In the past decades, metamaterial light absorbers have attracted tremendous attention due to their impressive absorption efficiency and significant potential for multiple kinds of applications. However, the conventional noble metals based metamaterial and nanomaterial absorbers always suffer from the structural damage by the local high temperature resulting from the strong plasmonic photo-thermal effects. To address this challenge, intensive research has been conducted to develop the absorbers which can realize efficient light absorption and simultaneously keep the structural stability under high temperatures. In this review, we present detail discussion on the refractory materials which can provide robust thermal stability and high performance for light absorption. Moreover, promising theoretical designs and experimental demonstrations that possess excellent features are also reviewed, including broadband strong light absorption, high temperature durability, and even the easy-to-fabricate configuration. Some applications challenges and prospects of refractory materials based plasmonic perfect absorbers are also introduced and discussed.
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Affiliation(s)
- Yu Yao
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, People's Republic of China
| | - Jin Zhou
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, People's Republic of China
| | - Zhengqi Liu
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, People's Republic of China
| | - Xiaoshan Liu
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, People's Republic of China
| | - Guolan Fu
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, People's Republic of China
| | - Guiqiang Liu
- Jiangxi Key Laboratory of Nanomaterials and Sensors, Jiangxi Key Laboratory of Photoelectronics and Telecommunication, College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, Jiangxi, People's Republic of China
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211
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Prepelita P, Garoi F, Craciun V. Structural and optical characteristics determined by the sputtering deposition conditions of oxide thin films. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2021; 12:354-365. [PMID: 33968560 PMCID: PMC8077636 DOI: 10.3762/bjnano.12.29] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 04/03/2021] [Indexed: 05/16/2023]
Abstract
The influence of film thickness on the structural and optical properties of silicon dioxide (SiO2) and zinc oxide (ZnO) thin films deposited by radio frequency magnetron sputtering on quartz substrates was investigated. The deposition conditions were optimized to achieve stoichiometric thin films. The orientation of crystallites, structure, and composition were investigated by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS), while the surface topography of the samples was analyzed using scanning electron microscopy (SEM). The optical characteristics were measured for samples with the same composition but obtained with different deposition parameters, such as increasing thickness. The optical constants (i.e., the refractive index n, the extinction coefficient k, and the absorption coefficient α) of the SiO2 and ZnO oxide films were determined from the transmission spectra recorded in the range of 190-2500 nm by using the Swanepoel method, while the energy bandgap was calculated from the absorption spectra. The influence of thickness on the structural and optical properties of the oxide films was investigated. Good optical quality and performance were noticed, which makes these thin films worthy of integration into metamaterial structures.
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Affiliation(s)
- Petronela Prepelita
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, PO Box MG-36, Magurele 077125, Ilfov, Romania
| | - Florin Garoi
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, PO Box MG-36, Magurele 077125, Ilfov, Romania
| | - Valentin Craciun
- National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, PO Box MG-36, Magurele 077125, Ilfov, Romania
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212
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Cuscunà M, Manoccio M, Esposito M, Scuderi M, Nicotra G, Tarantini I, Melcarne A, Tasco V, Losurdo M, Passaseo A. Gallium chiral nanoshaping for circular polarization handling. MATERIALS HORIZONS 2021; 8:187-196. [PMID: 34821297 DOI: 10.1039/d0mh01078b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In this work we report the local growth of ordered arrays of 3D core-shell chiral nanohelices based on plasmonic gallium metal. The structures can be engineered in a single step using focused ion beam induced deposition, where a Ga+ ion source is used to shape the metallic nanohelix core, while the dielectric precursor is dissociated to create dielectric shells. The solubility of gallium in the different investigated dielectric matrices controls the core-shell thickness ratio of the nanohelices. The chiral plasmonic behaviour of these gallium-based nanostructures is experimentally measured by circularly polarized light transmission through nanostructure arrays and compared with numerical simulations. Large chiroptical effects in the visible range are demonstrated due to the plasmonic effects arising from gallium nanoclusters in the core.
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Affiliation(s)
- Massimo Cuscunà
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy.
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213
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Peng Y, Lin C, Long L, Masaki T, Tang M, Yang L, Liu J, Huang Z, Li Z, Luo X, Lombardi JR, Yang Y. Charge-Transfer Resonance and Electromagnetic Enhancement Synergistically Enabling MXenes with Excellent SERS Sensitivity for SARS-CoV-2 S Protein Detection. NANO-MICRO LETTERS 2021; 13:52. [PMID: 33425476 PMCID: PMC7783703 DOI: 10.1007/s40820-020-00565-4] [Citation(s) in RCA: 89] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Accepted: 11/19/2020] [Indexed: 05/18/2023]
Abstract
The outbreak of coronavirus disease 2019 has seriously threatened human health. Rapidly and sensitively detecting SARS-CoV-2 viruses can help control the spread of viruses. However, it is an arduous challenge to apply semiconductor-based substrates for virus SERS detection due to their poor sensitivity. Therefore, it is worthwhile to search novel semiconductor-based substrates with excellent SERS sensitivity. Herein we report, for the first time, Nb2C and Ta2C MXenes exhibit a remarkable SERS enhancement, which is synergistically enabled by the charge transfer resonance enhancement and electromagnetic enhancement. Their SERS sensitivity is optimized to 3.0 × 106 and 1.4 × 106 under the optimal resonance excitation wavelength of 532 nm. Additionally, remarkable SERS sensitivity endows Ta2C MXenes with capability to sensitively detect and accurately identify the SARS-CoV-2 spike protein. Moreover, its detection limit is as low as 5 × 10-9 M, which is beneficial to achieve real-time monitoring and early warning of novel coronavirus. This research not only provides helpful theoretical guidance for exploring other novel SERS-active semiconductor-based materials but also provides a potential candidate for the practical applications of SERS technology.
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Affiliation(s)
- Yusi Peng
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050 People’s Republic of China
- Graduate School of the Chinese Academy of Sciences, No.19(A) Yuquan Road, Beijing, 100049 People’s Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 People’s Republic of China
| | - Chenglong Lin
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050 People’s Republic of China
- Graduate School of the Chinese Academy of Sciences, No.19(A) Yuquan Road, Beijing, 100049 People’s Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 People’s Republic of China
| | - Li Long
- School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510641 People’s Republic of China
| | - Tanemura Masaki
- Department of Frontier Materials, Nagoya Institute of Technology, Nagoya, 466-8555 Japan
| | - Mao Tang
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050 People’s Republic of China
| | - Lili Yang
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050 People’s Republic of China
- Graduate School of the Chinese Academy of Sciences, No.19(A) Yuquan Road, Beijing, 100049 People’s Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 People’s Republic of China
| | - Jianjun Liu
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050 People’s Republic of China
| | - Zhengren Huang
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050 People’s Republic of China
| | - Zhiyuan Li
- School of Physics and Optoelectronics, South China University of Technology, Guangzhou, 510641 People’s Republic of China
| | - Xiaoying Luo
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200032 People’s Republic of China
| | | | - Yong Yang
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai, 200050 People’s Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049 People’s Republic of China
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214
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A Compact Component for Multi-Band Rejection and Frequency Coding in the Plasmonic Circuit at Microwave Frequencies. ELECTRONICS 2020. [DOI: 10.3390/electronics10010004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Plasmonic circuits, which support the propagation of spoof surface plasmon polaritons (SSPPs) at microwave frequencies, have been developed in recent years as an expected candidate for future highly integrated systems, mainly because of their extraordinary field confinements and sub-wavelength resolution. On the other hand, artificial electromagnetic (EM) resonators are widely adopted in metamaterial design for flexible resonance and band gaps. In this work, an electrically small complementary spiral, which is made up of six helix branches sculptured in the ground, is proposed to achieve independent resonances at six different frequency bands. Combined with the grounded corrugated transmission line (TL), the proposed component can provide designable multi-band rejection, and compose frequency coding circuits with a compact size (less than λ0/4). The complementary spirals excited with the bending TL and the straight one are both investigated, and independence band rejections and designed 6-bit coding sequences in the frequency spectrum are demonstrated numerically and experimentally. Hence, it is concluded that such compact components can be adopted to flexibly control the rejection of waves in multi-frequency bands, and benefits the development of frequency-identification circuits and systems.
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215
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Han B, Jin S, Chu Q, Jin Y, Xue X, Guo S, Park Y, Chen L, Jung YM. New insight into SPR modulating by two-dimensional correlation spectroscopy: the case for an Ag/ITO system. NANOSCALE 2020; 12:24357-24361. [PMID: 33206091 DOI: 10.1039/d0nr06256a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The localized surface plasmon resonance (LSPR) of Ag/indium tin oxide (ITO)@polystyrene (PS) in the visible-NIR region was dependent on the tuning of the carrier density caused by adjusting the thickness of the ITO layer. The two-dimensional correlation spectroscopy (2D-COS) results of the dependence of each component in the UV-vis-NIR spectrum on the carrier density response enabled the successful exploration of the carrier transport process.
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Affiliation(s)
- Bingbing Han
- Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun 130103, P.R. China.
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216
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Yu MW, Ishii S, Shinde SL, Tanjaya NK, Chen KP, Nagao T. Direct Observation of Photoinduced Charge Separation at Transition-Metal Nitride-Semiconductor Interfaces. ACS APPLIED MATERIALS & INTERFACES 2020; 12:56562-56567. [PMID: 33259198 DOI: 10.1021/acsami.0c14690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Optically excited hot carriers from metallic nanostructures forming metal-semiconductor heterostructures are advantageous for enhancing photoelectric conversion in the sub-band gap photon energy regime. Plasmonic gold has been widely used for hot carrier excitation, but recent works have demonstrated that plasmonic transition-metal nitrides have higher efficiencies in injecting hot electrons to adjacent n-type semiconductors and are more cost-effective. To collect direct evidence of hot carrier excitation from nanostructures, imaging of hot carriers is essential. In this work, photoexcited Kelvin probe force microscopy (KPFM) is used to image hot carriers excited in transition-metal nitride nanostructures forming heterostructures with semiconductors. Among available transition-metal nitrides, we select zirconium nitride (ZrN) for this study. Additionally, both p-type and n-type titanium dioxides (TiO2) are selected to study the transport of hot holes and hot electrons. The KPFM results indicate that for ZrN and p-type TiO2 heterostructures, hot holes are injected into the p-type TiO2 across the Schottky contact. In the case of ZrN and n-type TiO2 heterostructures, hot electrons are injected into the n-type TiO2 across the ohmic contact. Because transition-metal nitrides are known to be more effective than gold at injecting hot carriers into adjacent semiconductors, unambiguously determining the mechanisms of hot carrier transportation of transition-metal nitrides using photoexcited KPFM will facilitate additional studies on hot carrier applications with transition-metal nitrides.
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Affiliation(s)
- Min-Wen Yu
- Institute of Lighting and Energy Photonics, College of Photonics, National Chiao Tung University, 301 Gaofa 3rd Road, Tainan 71150, Taiwan
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Satoshi Ishii
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Faculty of Pure and Applied Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Satish Laxman Shinde
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Nicholaus Kevin Tanjaya
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Faculty of Pure and Applied Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan
| | - Kuo-Ping Chen
- Institute of Imaging and Biomedical Photonic, College of Photonics, National Chiao Tung University, 301 Gaofa 3rd Road, Tainan 71150, Taiwan
| | - Tadaaki Nagao
- International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Department of Condensed Matter Physics, Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
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217
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Wang C, Su H, Ma X, Xiong Z, Zhao H. Young's double-slit-like diffraction stemming from scattering of long-ranged surface plasmon polaritons along distinct ±Z-faces' metallic layers in indium-tin-oxide coated Fe doped LiNbO 3. OPTICS LETTERS 2020; 45:6823-6826. [PMID: 33325905 DOI: 10.1364/ol.411510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 11/23/2020] [Indexed: 06/12/2023]
Abstract
Young's double-slit-like diffraction was seen on a viewing screen placed perpendicularly to a sharply cut edge of a Z-cut iron doped LiNbO3 (LN) slab coated with indium-tin-oxide (ITO) films. The high contrast fringes observed confirm two sets of visible long-ranged surface plasmon polaritons propagating along the two ITO-LN interfaces distinctly over 5 mm path length with well-kept coherency, apart from metal uses. The indices of refraction measured with polarimetry from the ±Z-faces and changing transmission spectra obtained are consistent with the physical picture, along with dynamics of the very first reflection from the -Z-face under varying polarization angles between the two incident laser beams onto the slab.
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218
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Rizzo D, Jessen BS, Sun Z, Ruta FL, Zhang J, Yan JQ, Xian L, McLeod AS, Berkowitz ME, Watanabe K, Taniguchi T, Nagler SE, Mandrus DG, Rubio A, Fogler MM, Millis AJ, Hone JC, Dean CR, Basov DN. Charge-Transfer Plasmon Polaritons at Graphene/α-RuCl 3 Interfaces. NANO LETTERS 2020; 20:8438-8445. [PMID: 33166145 PMCID: PMC7729890 DOI: 10.1021/acs.nanolett.0c03466] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 11/02/2020] [Indexed: 05/24/2023]
Abstract
Nanoscale charge control is a key enabling technology in plasmonics, electronic band structure engineering, and the topology of two-dimensional materials. By exploiting the large electron affinity of α-RuCl3, we are able to visualize and quantify massive charge transfer at graphene/α-RuCl3 interfaces through generation of charge-transfer plasmon polaritons (CPPs). We performed nanoimaging experiments on graphene/α-RuCl3 at both ambient and cryogenic temperatures and discovered robust plasmonic features in otherwise ungated and undoped structures. The CPP wavelength evaluated through several distinct imaging modalities offers a high-fidelity measure of the Fermi energy of the graphene layer: EF = 0.6 eV (n = 2.7 × 1013 cm-2). Our first-principles calculations link the plasmonic response to the work function difference between graphene and α-RuCl3 giving rise to CPPs. Our results provide a novel general strategy for generating nanometer-scale plasmonic interfaces without resorting to external contacts or chemical doping.
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Affiliation(s)
- Daniel
J. Rizzo
- Department
of Physics, Columbia University, New York, New York 10027, United States
| | - Bjarke S. Jessen
- Department
of Physics, Columbia University, New York, New York 10027, United States
- Department
of Mechanical Engineering, Columbia University, New York, New York 10027, United States
| | - Zhiyuan Sun
- Department
of Physics, Columbia University, New York, New York 10027, United States
| | - Francesco L. Ruta
- Department
of Physics, Columbia University, New York, New York 10027, United States
- Department
of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States
| | - Jin Zhang
- Theory
Department, Max Planck Institute for Structure
and Dynamics of Matter and Center for Free-Electron Laser Science, 22761 Hamburg, Germany
| | - Jia-Qiang Yan
- Materials
Science and Technology Division, Oak Ridge
National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department
of Materials Science and Engineering, University
of Tennessee, Knoxville, Tennessee 37996, United States
| | - Lede Xian
- Theory
Department, Max Planck Institute for Structure
and Dynamics of Matter and Center for Free-Electron Laser Science, 22761 Hamburg, Germany
| | - Alexander S. McLeod
- Department
of Physics, Columbia University, New York, New York 10027, United States
| | - Michael E. Berkowitz
- Department
of Physics, Columbia University, New York, New York 10027, United States
| | - Kenji Watanabe
- Research
Center for Functional Materials, National
Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Takashi Taniguchi
- International
Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-004, Japan
| | - Stephen E. Nagler
- Neutron
Scattering Division, Oak Ridge National
Laboratory, Oak Ridge, Tennessee 37831, United States
| | - David G. Mandrus
- Materials
Science and Technology Division, Oak Ridge
National Laboratory, Oak Ridge, Tennessee 37831, United States
- Department
of Materials Science and Engineering, University
of Tennessee, Knoxville, Tennessee 37996, United States
| | - Angel Rubio
- Theory
Department, Max Planck Institute for Structure
and Dynamics of Matter and Center for Free-Electron Laser Science, 22761 Hamburg, Germany
- Center
for Computational Quantum Physics, Flatiron
Institute, New York, New York 10010, United
States
- Nano-Bio
Spectroscopy Group, Universidad del País
Vasco UPV/EHU, San Sebastián 20018, Spain
| | - Michael M. Fogler
- Department
of Physics, University of California San
Diego, La Jolla, California 92093, United States
| | - Andrew J. Millis
- Department
of Physics, Columbia University, New York, New York 10027, United States
- Center
for Computational Quantum Physics, Flatiron
Institute, New York, New York 10010, United
States
| | - James C. Hone
- Department
of Mechanical Engineering, Columbia University, New York, New York 10027, United States
| | - Cory R. Dean
- Department
of Physics, Columbia University, New York, New York 10027, United States
| | - D. N. Basov
- Department
of Physics, Columbia University, New York, New York 10027, United States
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219
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Ray D, Raziman TV, Santschi C, Etezadi D, Altug H, Martin OJF. Hybrid Metal-Dielectric Metasurfaces for Refractive Index Sensing. NANO LETTERS 2020; 20:8752-8759. [PMID: 33206533 DOI: 10.1021/acs.nanolett.0c03613] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Hybrid metal-dielectric nanostructures have recently gained prominence because they combine strong field enhancement of plasmonic metals and the several low-loss radiation channels of dielectric resonators, which are qualities pertaining to the best of both worlds. In this work, an array of such hybrid nanoantennas is successfully fabricated over a large area and utilized for bulk refractive index sensing with a sensitivity of 208 nm/RIU. Each nanoantenna combines a Si cylinder with an Al disk, separated by a SiO2 spacer. Its optical response is analyzed in detail using the multipoles supported by its subparts and their mutual coupling. The nanoantenna is further modified experimentally with an undercut in the SiO2 region to increase the interaction of the electric field with the background medium, which augments the sensitivity to 245 nm/RIU. A detailed multipole analysis of the hybrid nanoantenna supports our experimental findings.
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Affiliation(s)
- Debdatta Ray
- Nanophotonics and Metrology Laboratory, Swiss Federal Institute of Technology Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - T V Raziman
- Nanophotonics and Metrology Laboratory, Swiss Federal Institute of Technology Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Christian Santschi
- Nanophotonics and Metrology Laboratory, Swiss Federal Institute of Technology Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Dordaneh Etezadi
- Bionanophotonic Systems Laboratory, Swiss Federal Institute of Technology Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Hatice Altug
- Bionanophotonic Systems Laboratory, Swiss Federal Institute of Technology Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Olivier J F Martin
- Nanophotonics and Metrology Laboratory, Swiss Federal Institute of Technology Lausanne (EPFL), 1015 Lausanne, Switzerland
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220
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Raja SS, Cheng CW, Gwo S. Low-loss aluminum epitaxial film for scalable and sustainable plasmonics: direct comparison with silver epitaxial film. NANOSCALE 2020; 12:23809-23816. [PMID: 33237103 DOI: 10.1039/d0nr06603f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Aluminum is a plasmonic material well known for its excellent stability, complementary metal-oxide-semiconductor compatibility and wide availability as compared to popular plasmonic materials such as gold and silver. Aluminum can support surface plasmon resonances in a broad spectral range, including the deep ultra-violet, a regime where no other plasmonic materials can work. However, conventional aluminum films suffer from high losses in the visible region and low fidelity and reproducibility in nanofabrication, making aluminum plasmonics non-ideal for applications. Herein, we report the experimental results of consistent surface plasmon propagation length measurements for epitaxially grown aluminum and silver films (epifilms), using three different methods (white light interferometry, laser scattering and spectroscopic ellipsometry) in the full visible spectrum. In order to avoid losses caused by inferior material quality, we used single-crystalline aluminum and silver films for direct comparison. We found that, on directly comparing with the silver epifilm, the aluminum epifilm possesses reasonably long plasmon propagation lengths in the full visible range and outperforms silver in the deep blue region. These results illustrate the great potential of epitaxial aluminum films for visible-spectrum plasmonic applications, resulting from their superior crystallinity and excellent surface and interface properties.
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Affiliation(s)
- Soniya S Raja
- Institute of NanoEngineering and MicroSystems, National Tsing-Hua University, Hsinchu 30013, Taiwan.
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221
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Chen L, Hu H, Chen Y, Li Y, Gao J, Li G. Sulfur Precursor Reactivity Affecting the Crystal Phase and Morphology of Cu
2−
x
S Nanoparticles. Chemistry 2020; 27:1057-1065. [DOI: 10.1002/chem.202003760] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/09/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Lihui Chen
- College of Chemical Engineering Zhejiang University of Technology 18, Chaowang Road Hangzhou 310014 P.R. China
| | - Haifeng Hu
- College of Chemical Engineering Zhejiang University of Technology 18, Chaowang Road Hangzhou 310014 P.R. China
| | - Yuzhou Chen
- College of Chemical Engineering Zhejiang University of Technology 18, Chaowang Road Hangzhou 310014 P.R. China
| | - Yuan Li
- College of Chemical Engineering Zhejiang University of Technology 18, Chaowang Road Hangzhou 310014 P.R. China
| | - Jing Gao
- College of Chemical Engineering Zhejiang University of Technology 18, Chaowang Road Hangzhou 310014 P.R. China
| | - Guohua Li
- College of Chemical Engineering Zhejiang University of Technology 18, Chaowang Road Hangzhou 310014 P.R. China
- State Key Breeding Base of Green Chemistry Synthesis Technology Zhejiang University of Technology 18, Chaowang Road Hangzhou 310032 P.R. China
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222
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Huh JH, Kim K, Im E, Lee J, Cho Y, Lee S. Exploiting Colloidal Metamaterials for Achieving Unnatural Optical Refractions. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001806. [PMID: 33079414 DOI: 10.1002/adma.202001806] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Revised: 04/27/2020] [Indexed: 05/28/2023]
Abstract
The scaling down of meta-atoms or metamolecules (collectively denoted as metaunits) is a long-lasting issue from the time when the concept of metamaterials was first suggested. According to the effective medium theory, which is the foundational concept of metamaterials, the structural sizes of meta-units should be much smaller than the working wavelengths (e.g., << 1/5 wavelength). At relatively low frequency regimes (e.g., microwave and terahertz), the conventional monolithic lithography can readily address the materialization of metamaterials. However, it is still challenging to fabricate optical metamaterials (metamaterials working at optical frequencies such as the visible and near-infrared regimes) through the lithographic approaches. This serves as the rationale for using colloidal self-assembly as a strategy for the realization of optical metamaterials. Colloidal self-assembly can address various critical issues associated with the materialization of optical metamaterials, such as achieving nanogaps over a large area, increasing true 3D structural complexities, and cost-effective processing, which all are difficult to attain through monolithic lithography. Nevertheless, colloidal self-assembly is still a toolset underutilized by optical engineers. Here, the design principle of the colloidally self-assembled optical metamaterials exhibiting unnatural refractions, the practical challenge of relevant experiments, and the future opportunities are critically reviewed.
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Affiliation(s)
- Ji-Hyeok Huh
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Kwangjin Kim
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Eunji Im
- Department of Biomicrosystem Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Jaewon Lee
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - YongDeok Cho
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
| | - Seungwoo Lee
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul, 02841, Republic of Korea
- Department of Biomicrosystem Technology, Korea University, Seoul, 02841, Republic of Korea
- Department of Integrative Energy Engineering (IEE) and KU Photonics Center, Korea University, Seoul, 02841, Republic of Korea
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223
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Kuda-Singappulige GU, Wildman A, Lingerfelt DB, Li X, Aikens CM. Ultrafast Nonradiative Decay of a Dipolar Plasmon-like State in Naphthalene. J Phys Chem A 2020; 124:9729-9737. [PMID: 33181013 DOI: 10.1021/acs.jpca.0c09564] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Motivated by the uncertainty in our understanding of ultrafast plasmon decay mechanisms, we examine the effect of nuclear vibrations on the dynamical behavior of the strong plasmon-like dipole response of naphthalene, known as the β peak. The real-time time-dependent density functional (RT-TDDFT) method coupled with Ehrenfest molecular dynamics is used to describe the interconnected nuclear and electronic motion. Several vibrational modes promote drastic plasmon decay in naphthalene. The most astonishing finding of this study is that activation of one particular vibrational mode (corresponding to the B1u representation in D2h point group symmetry) leads to a continuous drop of the dipole response corresponding to the β peak into a totally symmetric, dark, quadrupolar electronic state. A second B1u mode provokes the sharp plasmon-like peak to split due to the breaking of structural symmetry. Nonadiabatic coupling between a B2g vibrational mode and the β peak (a B1u electronic state) gives rise to a B3u vibronic state, which can be identified as one of the p-band peaks that reside close in energy to the β peak energy. Overall, strong nonadiabatic coupling initiates plasmon decay into nearby electronic states in acenes, most importantly into dark states. These findings expand our knowledge about possible plasmon decay processes and pave the way for achieving high optical performance in acene-based materials such as graphene.
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Affiliation(s)
| | - Andrew Wildman
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - David B Lingerfelt
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States.,Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Christine M Aikens
- Department of Chemistry, Kansas State University, Manhattan, Kansas 66506, United States
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224
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Liang Y, Li C, Huang YZ, Zhang Q. Plasmonic Nanolasers in On-Chip Light Sources: Prospects and Challenges. ACS NANO 2020; 14:14375-14390. [PMID: 33119269 DOI: 10.1021/acsnano.0c07011] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The plasmonic nanolaser is a class of lasers with the physical dimensions free from the optical diffraction limit. In the past decade, progress in performance, applications, and mechanisms of plasmonic nanolasers has increased dramatically. We review this advance and offer our prospectives on the remaining challenges ahead, concentrating on the integration with nanochips. In particular, we focus on the qualifications for electrical pumping, energy consumption, and ultrafast modulation. At last, we evaluate the strategies for on-chip source construction design and further threshold reduction to achieve a long-term room-temperature electrically pumped plasmonic nanolaser, the ultimate goal toward practical applications.
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Affiliation(s)
- Yin Liang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Chun Li
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Yong-Zhen Huang
- State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
| | - Qing Zhang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
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225
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Sarker A, Mitu SA, Das P, Choudhury SM. Structurally tunable gear-shaped plasmonic sensor. OPTICS EXPRESS 2020; 28:36070-36083. [PMID: 33379710 DOI: 10.1364/oe.410123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 11/05/2020] [Indexed: 06/12/2023]
Abstract
We present a gear-shaped plasmonic nano-structure with structural tunability and high RI sensitivity. New tunable geometric parameters of the gear-tooth give further flexibility for design. By using FDTD method, the reflection spectrum of the structure is theoretically analyzed with analyte RI in the range of 1.0 to 1.44. The best achieved sensitivity is- 1044 nm/RIU for our proposed structure. The resonance wavelength of the structure is independent of the polarization angle for large number of teeth. The structure can be used to design tunable sensors for biomedical and chemical applications.
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226
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Olafsson A, Busche JA, Araujo JJ, Maiti A, Idrobo JC, Gamelin DR, Masiello DJ, Camden JP. Electron Beam Infrared Nano-Ellipsometry of Individual Indium Tin Oxide Nanocrystals. NANO LETTERS 2020; 20:7987-7994. [PMID: 32870693 DOI: 10.1021/acs.nanolett.0c02772] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Leveraging recent advances in electron energy monochromation and aberration correction, we record the spatially resolved infrared plasmon spectrum of individual tin-doped indium oxide nanocrystals using electron energy-loss spectroscopy (EELS). Both surface and bulk plasmon responses are measured as a function of tin doping concentration from 1-10 atomic percent. These results are compared to theoretical models, which elucidate the spectral detuning of the same surface plasmon resonance feature when measured from aloof and penetrating probe geometries. We additionally demonstrate a unique approach to retrieving the fundamental dielectric parameters of individual semiconductor nanocrystals via EELS. This method, devoid from ensemble averaging, illustrates the potential for electron-beam ellipsometry measurements on materials that cannot be prepared in bulk form or as thin films.
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Affiliation(s)
- Agust Olafsson
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Jacob A Busche
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Jose J Araujo
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Arpan Maiti
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Juan Carlos Idrobo
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Daniel R Gamelin
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - David J Masiello
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Jon P Camden
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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227
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Noman AA, Haque E, Hossain MA, Hai NH, Namihira Y, Ahmed F. Sensitivity Enhancement of Modified D-Shaped Microchannel PCF-Based Surface Plasmon Resonance Sensor. SENSORS 2020; 20:s20216049. [PMID: 33114283 PMCID: PMC7660600 DOI: 10.3390/s20216049] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/11/2020] [Accepted: 10/20/2020] [Indexed: 02/05/2023]
Abstract
In this work, a highly sensitive dual-core configured microchannel-based plasmonic refractive index (RI) sensor was investigated, which can be used for low RI detection. Both the sensing layer and the plasmonic material layer were built outside of the fiber design to detect the surrounding medium’s RI changes. Additionally, the effects of different plasmonic materials gold (Au), silver (Ag), and copper (Cu) toward sensitivity were investigated for the same structure. An adhesive agent was used in this work, titanium dioxide (TiO2), and was coated on top of the plasmonic material to prevent the oxidation of Ag and Cu. The coupling strength between the fundamental mode and the surface plasmon polariton (SPP) mode was observed to be very strong due to the TiO2 adhesive agent. With a resolution of 7.41 × 10−7 RIU, maximum wavelength sensitivity (WS) of 135,000 nm/RIU and amplitude sensitivity (AS) of 3239 RIU−1 were achieved using the proposed sensor while using Au as a plasmonic material for an analyte RI range of 1.29–1.39. A detailed study of relevant literature revealed that the achieved wavelength sensitivity for plasmonic material gold (Au) is the highest among reported photonic crystal fiber (PCF)-surface plasmon resonance (SPR) sensors to date.
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Affiliation(s)
- Abdullah Al Noman
- Department of Electrical and Electronic Engineering, Independent University Bangaldesh, Dhaka 1229, Bangladesh; (E.H.); (F.A.)
- Correspondence: or
| | - Emranul Haque
- Department of Electrical and Electronic Engineering, Independent University Bangaldesh, Dhaka 1229, Bangladesh; (E.H.); (F.A.)
| | - Md. Anwar Hossain
- Department of Electrical and Electronic Engineering, Bangladesh University of Business and Technology (BUBT), Dhaka 1216, Bangladesh;
| | - Nguyen Hoang Hai
- School of Electronics and Telecommunication, Hanoi University of Science and Technology, Ha Noi 10000, Vietnam;
| | - Yoshinori Namihira
- Faculty of Engineering, University of the Ryukyus, Okinawa 903-0213, Japan;
| | - Feroz Ahmed
- Department of Electrical and Electronic Engineering, Independent University Bangaldesh, Dhaka 1229, Bangladesh; (E.H.); (F.A.)
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228
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Wang X, Wang H. Self-assembled nitride-metal nanocomposites: recent progress and future prospects. NANOSCALE 2020; 12:20564-20579. [PMID: 33090168 DOI: 10.1039/d0nr06316a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Two-phase nanocomposites have gained significant research interest because of their multifunctionalities, tunable geometries and potential device applications. Different from the previously demonstrated oxide-oxide 2-phase nanocomposites, coupling nitrides with metals shows high potential for building alternative hybrid plasmonic metamaterials towards chemical sensing, tunable plasmonics, and nonlinear optics. Unique advantages, including distinct atomic interface, excellent crystalline quality, large-scale surface coverage and durable solid-state platform, address the high demand for new hybrid metamaterial designs for versatile optical material needs. This review summarizes the recent progress on nitride-metal nanocomposites, specifically targeting bottom-up self-assembled nanocomposite thin films. Various morphologies including vertically aligned nanocomposites (VANs), self-organized nanoinclusions, and nanoholes fabricated by additional chemical treatments are introduced. Starting from thin film nucleation and growth, the prerequisites of successful strain coupling and the underlying growth mechanisms are discussed. These findings facilitate a better control of tunable nanostructures and optical functionalities. Future research directions are proposed, including morphological control of the secondary phase to enhance its homogeneity, coupling nitrides with magnetic phase for the magneto-optical effect and growing all-ceramic nanocomposites to extend functionalities and anisotropy.
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Affiliation(s)
- Xuejing Wang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. and School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, IN 47907, USA. and School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA
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229
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Su H, Wang C, Zhang J, Wang Y, Zhao H. Charge accumulation resulting in metallization of II-VI semiconductor (ZnX X = O, S, Se) films neighboring polar liquid crystal molecules and their surface plasmonic response in the visible region. NANOSCALE 2020; 12:20820-20830. [PMID: 33035280 DOI: 10.1039/d0nr05036a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The surfaces of some IIB-VI semiconductors (ZnX, X = O, S, Se) are metallized by neighboring highly polar and atomically vertically aligned (VA) liquid crystal (LC) molecules. Owing to polar catastrophe, the charge carriers swarm in an extremely thin layer and the density can achieve 4.86 × 1028 m-3 close to the LC layer, which can be regarded as a 2-dimensional electron gas (2DEG). Using density functional theory (DFT), it was found that the dielectric functions of the modified layer become negative in the visible region. This indicates the semiconductor/LC platform is an ideal active plasmonic candidate, apart from the lossy metal constituents. Experimentally, after mediation with phase gratings written in the LC system, surface plasmon polaritons (SPPs) can be excited at the semiconductor surface and localized charges are gathered in an adjacent LC layer. With the help of the enhanced static electric field from the metallic surface, significantly more 2D diffraction orders in many rows and columns and a huge energy transfer between the laser beams and SPPs was observed, which is consistent with the metallization results and the bidirectional coupling between the SPPs and incident lights. The generalization of the II-VI semiconductors means the system has great promise for use in practical applications owing to the ultra-low loss. The novel insights regarding this combination with liquid crystals will be beneficial for real-time holographic displays and the study of tunable epsilon near zero points.
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Affiliation(s)
- Hang Su
- School of Physics, Harbin Institute of Technology, Harbin, 150001, China.
| | - Chao Wang
- School of Physics, Harbin Institute of Technology, Harbin, 150001, China.
| | - Jingwen Zhang
- School of Physics, Harbin Institute of Technology, Harbin, 150001, China. and Key Laboratory of Micro-Optics and Photonics Technology of Heilongjiang Province, Harbin, 150001, China
| | - Yingce Wang
- School of Physics, Harbin Institute of Technology, Harbin, 150001, China.
| | - Hua Zhao
- School of Physics, Harbin Institute of Technology, Harbin, 150001, China. and Key Laboratory of Micro-Optics and Photonics Technology of Heilongjiang Province, Harbin, 150001, China and Key Laboratory of Micro-Nano Optoelectronic Information System, Ministry of Industry and Information Technology, Harbin 150001, China
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230
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Unni R, Yao K, Zheng Y. Deep Convolutional Mixture Density Network for Inverse Design of Layered Photonic Structures. ACS PHOTONICS 2020; 7:2703-2712. [PMID: 38031541 PMCID: PMC10686261 DOI: 10.1021/acsphotonics.0c00630] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Machine learning (ML) techniques, such as neural networks, have emerged as powerful tools for the inverse design of nanophotonic structures. However, this innovative approach suffers some limitations. A primary one is the nonuniqueness problem, which can prevent ML algorithms from properly converging because vastly different designs produce nearly identical spectra. Here, we introduce a mixture density network (MDN) approach, which models the design parameters as multimodal probability distributions instead of discrete values, allowing the algorithms to converge in cases of nonuniqueness without sacrificing degenerate solutions. We apply our MDN technique to inversely design two types of multilayer photonic structures consisting of thin films of oxides, which present a significant challenge for conventional ML algorithms due to a high degree of nonuniqueness in their optical properties. In the 10-layer case, the MDN can handle transmission spectra with high complexity and under varying illumination conditions. The 4-layer case tends to show a stronger multimodal character, with secondary modes indicating alternative solutions for a target spectrum. The shape of the distributions gives valuable information for postprocessing and about the uncertainty in the predictions, which is not available with deterministic networks. Our approach provides an effective solution to the inverse design of photonic structures and yields more optimal searches for the structures with high degeneracy and spectral complexity.
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Affiliation(s)
- Rohit Unni
- Walker Department of Mechanical Engineering and Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Kan Yao
- Walker Department of Mechanical Engineering and Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Yuebing Zheng
- Walker Department of Mechanical Engineering and Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States
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231
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Peng Y, Cai P, Yang L, Liu Y, Zhu L, Zhang Q, Liu J, Huang Z, Yang Y. Theoretical and Experimental Studies of Ti 3C 2 MXene for Surface-Enhanced Raman Spectroscopy-Based Sensing. ACS OMEGA 2020; 5:26486-26496. [PMID: 33110976 PMCID: PMC7581265 DOI: 10.1021/acsomega.0c03009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 09/23/2020] [Indexed: 05/07/2023]
Abstract
Recent advances in MXenes with high carrier mobility show great application prospects in the surface-enhanced Raman scattering (SERS) field. However, challenges remain regarding the improvement of the SERS sensitivity. Herein, an effective strategy considering charge-transfer resonance for semiconductor-based substrates is presented to optimize the SERS sensitivity with the guidance of the density functional theory calculation. The theoretical calculation predicted that the excellent SERS enhancement for methylene blue (MeB) on Ti3C2 MXene can be excited by both 633 and 785 nm lasers, and the Raman enhanced effect is mainly originated from the charge-transfer resonance enhancement. In this work, the Ti3C2 MXenes exhibit an excellent SERS sensitivity with an enhancement factor of 2.9 × 106 and a low detection limit of 10-7 M for MeB molecules. Furthermore, the SERS enhancement of Ti3C2 and Au-Ti3C2 substrates exhibit higher selectivity on different molecules, which contributes to the detection of target molecules in complex solution environments. This work can provide some theoretical and experimental basis for the research on SERS activity of other MXene materials.
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Affiliation(s)
- Yusi Peng
- State Key Laboratory
of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of
Sciences, 1295 Dingxi Road, Shanghai 200050, People’s Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ping Cai
- State Key Laboratory
of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of
Sciences, 1295 Dingxi Road, Shanghai 200050, People’s Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lili Yang
- State Key Laboratory
of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of
Sciences, 1295 Dingxi Road, Shanghai 200050, People’s Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yingying Liu
- State Key Laboratory
of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of
Sciences, 1295 Dingxi Road, Shanghai 200050, People’s Republic of China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Linfeng Zhu
- Shanghai Starriver Bilingual School, Shanghai 201108, China
| | - Qiuqi Zhang
- School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
| | - Jianjun Liu
- State Key Laboratory
of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of
Sciences, 1295 Dingxi Road, Shanghai 200050, People’s Republic of China
| | - Zhengren Huang
- State Key Laboratory
of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of
Sciences, 1295 Dingxi Road, Shanghai 200050, People’s Republic of China
| | - Yong Yang
- State Key Laboratory
of High-Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of
Sciences, 1295 Dingxi Road, Shanghai 200050, People’s Republic of China
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232
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Hanatani K, Yoshihara K, Sakamoto M, Saitow KI. Nanogap-Rich TiO 2 Film for 2000-Fold Field Enhancement with High Reproducibility. J Phys Chem Lett 2020; 11:8799-8809. [PMID: 32902290 DOI: 10.1021/acs.jpclett.0c02286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Titanium dioxide (TiO2) is a crucial semiconductor for photocatalysts, solar cells, hydrogen evolution reactions, and antivirus agents. The properties and performances of these applications can improve significantly if the integrated TiO2 acts as a light harvester through a large field enhancement. This study investigates the electromagnetic field enhancement of a nanogap-rich TiO2 film with a large area, prepared by a facile dry process at room temperature. Herein, the loading pressure is applied to the TiO2 particles for closely packing them in the film. The field enhancement, as a function of the loading pressure, is explored from the fluorescence intensity enhancement of a dye molecule. An average enhancement factor >2000 is achieved, which is a remarkable record for semiconductors. Furthermore, the reproducibility is significant; the relative standard deviation value is small (∼4%). Calculations were performed using the finite-difference-time-domain method. A nanogap of 5 nm yields the highest EF for triangular-prism TiO2 particles.
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Affiliation(s)
- Kaito Hanatani
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Kumi Yoshihara
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Masanori Sakamoto
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Ken-Ichi Saitow
- Department of Materials Science, Natural Science Center for Basic Research and Development (N-BARD), Hiroshima University, 1-3-1 Kagamiyama, Higashi-hiroshima, Hiroshima 739-8526, Japan
- Department of Chemistry, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
- Graduate School of Advanced Science and Engineering, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan
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233
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Sun M, Fu X, Chen K, Wang H. Dual-Plasmonic Gold@Copper Sulfide Core-Shell Nanoparticles: Phase-Selective Synthesis and Multimodal Photothermal and Photocatalytic Behaviors. ACS APPLIED MATERIALS & INTERFACES 2020; 12:46146-46161. [PMID: 32955860 DOI: 10.1021/acsami.0c13420] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Although the intriguing plasmonic properties of noble metal nanoparticles originate from the collective oscillations of free electrons in the conduction band, nanoparticles of doped semiconductors may also exhibit metal-like, plasmonic features that are dictated by the resonantly excited free hole oscillations in the valence band. Here, we combine Au, a representative free electron metal, with copper sulfides, a class of plasmonic p-type semiconductors, in a core-shell nanoparticle geometry to construct dual-plasmonic hetero-nanostructures displaying unique multiplex optical characteristics dominated by plasmonic hole oscillations in the semiconductor shells, plasmonic electron oscillations in the metallic cores, and interband electronic transitions from the valence to conduction bands. Through deliberately designed colloidal synthesis, we are able to selectively grow nanoshells comprising copper sulfides of specifically targeted crystalline phases and Cu/S stoichiometries, such as covellite (CuS), digenite (Cu1.8S), and nonstoichiometric Cu2-xS, on the surfaces of Au nanoparticle cores. Our synthetic approach enables us not only to finely control the core and shell dimensions but also to systematically adjust the free hole concentrations in the semiconductor shells, which forms the keystone for the fine tuning of multiple optical resonance modes supported by these hybrid hetero-nanostructures. The dual-plasmonic Au@copper sulfide core-shell nanoparticles exhibit unique multimodal photothermal and photocatalytic behaviors upon selective photoexcitations of different optical transitions at their characteristic resonant frequencies, allowing us to quantitatively evaluate and rigorously compare the intrinsic photothermal and photocatalytic efficacies of multiple types of hot charge carriers, all photoexcited in the same hybrid nanoparticles but with distinct photophysical origins, excited-state lifetimes, energy distributions, and transfer pathways.
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Affiliation(s)
- Mengqi Sun
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Xiaoqi Fu
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China
| | - Kexun Chen
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Hui Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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234
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Wang C, Su H, Ma X, Zhao H. Asymmetrical 1 st reflection trend owing to metallization difference at ± Z-faces in indium tin oxide coated Fe-doped lithium niobate. OPTICS EXPRESS 2020; 28:32042-32048. [PMID: 33115167 DOI: 10.1364/oe.404870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 09/30/2020] [Indexed: 06/11/2023]
Abstract
The charges accumulated at the interface of indium tin oxide (ITO) and iron doped lithium niobate (LN) in an extremely thin layer because of semiconductor band alignment were analyzed with ab initio theory. The formation of 2D electron gas makes the interface metallic and the excitation of surface plasmon polaritons (SPPs) possible. In experiments, diametrically opposite trends of the very first reflection (VFR) on the ± Z-faces of ITO coated Fe-LN slabs were observed and associated with the differences in metallization and the photovoltaic charge accumulation there. Microscopically, the electric environments of the two ITO/LN interfaces differ greatly owing to spontaneous polarization and photovoltaic fields, which alter the band structures and band alignment, resulting in phase gratings with a π-shift difference recorded at the two interfaces. This affects the opposite energy coupling between the SPPs and laser beams and results in the dramatically opposite trends of VFR.
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235
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Wang X, Choi J, Liu J, Malis O, Li X, Bermel P, Zhang X, Wang H. 3D Hybrid Trilayer Heterostructure: Tunable Au Nanorods and Optical Properties. ACS APPLIED MATERIALS & INTERFACES 2020; 12:45015-45022. [PMID: 32960570 DOI: 10.1021/acsami.0c14937] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Engineering plasmonic nanostructures from three dimensions (3D) is very attractive toward controllable and tunable nanophotonic components and devices. Herein, Au-based trilayer heterostructures composed of a dielectric spacer sandwiched by hybrid Au-TiN vertically aligned nanocomposite (VAN) nanoplasmonic claddings are demonstrated with a broad range of geometries and property tuning. Two types of spacer layers, that is, a pure dielectric BaTiO3 layer and a hybrid plasmonic Au-BaTiO3 VAN layer, contribute to the tuning of the Au nanorod dimension. Such geometrical variations of Au nanostructures originate from the surface energy and lattice strain tuned by the spacer layers. Optical measurements and numerical simulations suggest the change of the localized surface plasmon resonance which is strongly affected by the tailored Au nanorods as either separated or channeled. The uniaxial dielectric tensors suggest a tunable hyperbolic property affected by such a metal-insulator-metal trilayer stack. The complex 3D heterostructures offer additional tuning parameters and design flexibilities in hybrid plasmonic metamaterials toward potential applications in light harvesting, sensing, and nanophotonic devices.
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Affiliation(s)
- Xuejing Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Junho Choi
- Department of Physics, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Juncheng Liu
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Oana Malis
- Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xiaoqin Li
- Department of Physics, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Peter Bermel
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xinghang Zhang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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236
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Deng S, Li R, Park JE, Guan J, Choo P, Hu J, Smeets PJM, Odom TW. Ultranarrow plasmon resonances from annealed nanoparticle lattices. Proc Natl Acad Sci U S A 2020; 117:23380-23384. [PMID: 32900952 PMCID: PMC7519217 DOI: 10.1073/pnas.2008818117] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
This paper reports how the spectral linewidths of plasmon resonances can be narrowed down to a few nanometers by optimizing the morphology, surface roughness, and crystallinity of metal nanoparticles (NPs) in two-dimensional (2D) lattices. We developed thermal annealing procedures to achieve ultranarrow surface lattice resonances (SLRs) with full-width at half-maxima linewidths as narrow as 4 nm from arrays of Au, Ag, Al, and Cu NPs. Besides annealing, we developed a chemical vapor deposition process to use Cu NPs as catalytic substrates for graphene growth. Graphene-encapsulated Cu NPs showed the narrowest SLR linewidths (2 nm) and were stable for months. These ultranarrow SLR nanocavity modes supported even narrower lasing emission spectra and high nonlinearity in the input-output light-light curves.
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Affiliation(s)
- Shikai Deng
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | - Ran Li
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
| | - Jeong-Eun Park
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | - Jun Guan
- Graduate Program in Applied Physics, Northwestern University, Evanston, IL 60208
| | - Priscilla Choo
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | - Jingtian Hu
- Department of Chemistry, Northwestern University, Evanston, IL 60208
| | | | - Teri W Odom
- Department of Chemistry, Northwestern University, Evanston, IL 60208;
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
- Graduate Program in Applied Physics, Northwestern University, Evanston, IL 60208
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237
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El-Eskandarany MS, Al-Salem SM, Ali N. Top-Down Reactive Approach for the Synthesis of Disordered ZrN Nanocrystalline Bulk Material from Solid Waste. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1826. [PMID: 32933163 PMCID: PMC7559881 DOI: 10.3390/nano10091826] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 09/03/2020] [Accepted: 09/10/2020] [Indexed: 11/16/2022]
Abstract
Transition metal nitrides possess superior mechanical, physical, and chemical properties that make them desirable materials for a broad range of applications. A prime example is zirconium nitride (ZrN), which can be obtained through different fabrication methods that require the applications of high temperature and pressure. The present work reports an interesting procedure for synthesizing disordered face centered cubic (fcc)-ZrN nanoparticles through the reactive ball milling (RBM) technique. One attractive point of this study is utilizing inexpensive solid-waste (SW) zirconium (Zr) rods as feedstock materials to fabricate ZrN nanopowders. The as-received SW Zr rods were chemically cleaned and activated, arc-melted, and then disintegrated into powders to obtain the starting Zr metal powders. The powders were charged and sealed under nitrogen gas using a pressurized milling steel vial. After 86 ks of milling, a single fcc-ZrN phase was obtained. This phase transformed into a metastable fcc-phase upon RBM for 259 ks. The disordered ZrN powders revealed good morphological characteristics of spherical shapes and ultrafine nanosize (3.5 nm). The synthetic ZrN nanopowders were consolidated through a spark plasma sintering (SPS) technique into nearly full-density (99.3% of the theoretical density for ZrN) pellets. SPS has proven to be an integral step in leading to desirable and controlled grain growth. Moreover, the sintered materials were not transformed into any other phase(s) upon consolidation at 1673 K. The results indicated that increasing the RBM time led to a significant decrease in the grain size of the ZrN powders. As a result, the microhardness of the consolidated samples was consequently improved with increasing RBM time.
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Affiliation(s)
- M Sherif El-Eskandarany
- Energy and Building Research Center, Kuwait Institute for Scientific Research, Safat 13109, Kuwait
| | - Sultan Majed Al-Salem
- Environment & Life Sciences Research Centre, Kuwait Institute for Scientific Research, Safat 13109, Kuwait
| | - Naser Ali
- Energy and Building Research Center, Kuwait Institute for Scientific Research, Safat 13109, Kuwait
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238
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Wang X, Wang H, Jian J, Rutherford BX, Gao X, Xu X, Zhang X, Wang H. Metal-Free Oxide-Nitride Heterostructure as a Tunable Hyperbolic Metamaterial Platform. NANO LETTERS 2020; 20:6614-6622. [PMID: 32787175 DOI: 10.1021/acs.nanolett.0c02440] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Metal-free plasmonic metamaterials with wide-range tunable optical properties are highly desired for various components in future integrated optical devices. Designing a ceramic-ceramic hybrid metamaterial has been theoretically proposed as a solution to this critical optical material demand. However, the processing of such all-ceramic metamaterials is challenging due to difficulties in integrating two very dissimilar ceramic phases as one hybrid system. In this work, an oxide-nitride hybrid metamaterial combining two highly dissimilar ceramic phases, i.e., semiconducting weak ferromagnetic NiO nanorods and conductive plasmonic TiN matrix, has been successfully integrated as a unique vertically aligned nanocomposite form. Highly anisotropic optical properties such as hyperbolic dispersions and strong magneto-optical coupling have been demonstrated under room temperature. The novel functionalities presented show the strong potentials of this new ceramic-ceramic hybrid thin film platform and its future applications in next-generation nanophotonics and magneto-optical integrated devices without the lossy metallic components.
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Affiliation(s)
- Xuejing Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Haohan Wang
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
| | - Jie Jian
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Bethany X Rutherford
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xingyao Gao
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Xiaoshan Xu
- Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States
| | - Xinghang Zhang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Haiyan Wang
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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239
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Li Z, Hong R, Liu T, Wang Q, Tao C, Lin H, Zhang D. The enhancement of nonlinear absorption of Ag thin film on laser induced defective MoOx buffer layer. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137727] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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240
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Nanostructured Color Filters: A Review of Recent Developments. NANOMATERIALS 2020; 10:nano10081554. [PMID: 32784749 PMCID: PMC7466596 DOI: 10.3390/nano10081554] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 07/22/2020] [Accepted: 07/23/2020] [Indexed: 01/22/2023]
Abstract
Color plays an important role in human life: without it life would be dull and monochromatic. Printing color with distinct characteristics, like hue, brightness and saturation, and high resolution, are the main characteristic of image sensing devices. A flexible design of color filter is also desired for angle insensitivity and independence of direction of polarization of incident light. Furthermore, it is important that the designed filter be compatible with the image sensing devices in terms of technology and size. Therefore, color filter requires special care in its design, operation and integration. In this paper, we present a comprehensive review of nanostructured color filter designs described to date and evaluate them in terms of their performance.
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241
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Tan YY, Yap PK, Xin Lim GL, Mehta M, Chan Y, Ng SW, Kapoor DN, Negi P, Anand K, Singh SK, Jha NK, Lim LC, Madheswaran T, Satija S, Gupta G, Dua K, Chellappan DK. Perspectives and advancements in the design of nanomaterials for targeted cancer theranostics. Chem Biol Interact 2020; 329:109221. [PMID: 32768398 DOI: 10.1016/j.cbi.2020.109221] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/18/2020] [Accepted: 08/03/2020] [Indexed: 12/23/2022]
Abstract
Cancer continues to be one of the most challenging diseases to be treated and is one of the leading causes of deaths around the globe. Cancers account for 13% of all deaths each year, with cancer-related mortality expected to rise to 13.1 million by the year 2030. Although, we now have a large library of chemotherapeutic agents, the problem of non-selectivity remains the biggest drawback, as these substances are toxic not only to cancerous cells, but also to other healthy cells in the body. The limitations with chemotherapy and radiation have led to the discovery and development of novel strategies for safe and effective treatment strategies to manage the menace of cancer. Researchers have long justified and have shed light on the emergence of nanotechnology as a potential area for cancer therapy and diagnostics, whereby, nanomaterials are used primarily as nanocarriers or as delivery agents for anticancer drugs due to their tumor targeting properties. Furthermore, nanocarriers loaded with chemotherapeutic agents also overcome biological barriers such as renal and hepatic clearances, thus improving therapeutic efficacy with lowered morbidity. Theranostics, which is the combination of rationally designed nanomaterials with cancer-targeting moieties, along with protective polymers and imaging agents has become one of the core keywords in cancer research. In this review, we have highlighted the potential of various nanomaterials for their application in cancer therapy and imaging, including their current state and clinical prospects. Theranostics has successfully paved a path to a new era of drug design and development, in which nanomaterials and imaging contribute to a large variety of cancer therapies and provide a promising future in the effective management of various cancers. However, in order to meet the therapeutic needs, theranostic nanomaterials must be designed in such a way, that take into account the pharmacokinetic and pharmacodynamics properties of the drug for the development of effective carcinogenic therapy.
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Affiliation(s)
- Yoke Ying Tan
- School of Health Sciences, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia
| | - Pui Khee Yap
- School of Health Sciences, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia
| | - Griselda Loo Xin Lim
- School of Health Sciences, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia
| | - Meenu Mehta
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Yinghan Chan
- School of Pharmacy, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia
| | - Sin Wi Ng
- School of Pharmacy, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia
| | - Deepak N Kapoor
- School of Pharmaceutical Sciences, Shoolini University of Biotechnology and Management Sciences, Solan, 173229, India
| | - Poonam Negi
- School of Pharmaceutical Sciences, Shoolini University of Biotechnology and Management Sciences, Solan, 173229, India
| | - Krishnan Anand
- Department of Chemical Pathology, School of Pathology, Faculty of Health Sciences and National Health Laboratory Service, University of the Free State, Bloemfontein, South Africa
| | - Sachin Kumar Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Punjab, India
| | - Niraj Kumar Jha
- Department of Biotechnology, School of Engineering & Technology (SET), Sharda University, Plot No.32-34 Knowledge Park III Greater Noida, Uttar Pradesh, 201310, India
| | - Lay Cheng Lim
- Department of Life Sciences, School of Pharmacy, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia
| | - Thiagarajan Madheswaran
- Department of Pharmaceutical Technology, School of Pharmacy, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia
| | - Saurabh Satija
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, Ultimo, NSW, 2007, Australia; School of Pharmaceutical Sciences, Lovely Professional University, Punjab, India
| | - Gaurav Gupta
- School of Pharmacy, Suresh Gyan Vihar University, Jagatpura Mahal Road, 302017, Jaipur, India
| | - Kamal Dua
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, Ultimo, NSW, 2007, Australia; School of Pharmaceutical Sciences, Shoolini University of Biotechnology and Management Sciences, Solan, 173229, India; Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute (HMRI) & School of Biomedical Sciences and Pharmacy, The University of Newcastle (UoN), Callaghan, NSW, 2308, Australia.
| | - Dinesh Kumar Chellappan
- Department of Life Sciences, School of Pharmacy, International Medical University, Bukit Jalil, 57000, Kuala Lumpur, Malaysia.
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242
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Esfahani Monfared Y. Overview of Recent Advances in the Design of Plasmonic Fiber-Optic Biosensors. BIOSENSORS-BASEL 2020; 10:bios10070077. [PMID: 32660135 PMCID: PMC7400712 DOI: 10.3390/bios10070077] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 07/01/2020] [Accepted: 07/08/2020] [Indexed: 12/22/2022]
Abstract
Plasmonic fiber-optic biosensors combine the flexibility and compactness of optical fibers and high sensitivity of nanomaterials to their surrounding medium, to detect biological species such as cells, proteins, and DNA. Due to their small size, accuracy, low cost, and possibility of remote and distributed sensing, plasmonic fiber-optic biosensors are promising alternatives to traditional methods for biomolecule detection, and can result in significant advances in clinical diagnostics, drug discovery, food process control, disease, and environmental monitoring. In this review article, we overview the key plasmonic fiber-optic biosensing design concepts, including geometries based on conventional optical fibers like unclad, side-polished, tapered, and U-shaped fiber designs, and geometries based on specialty optical fibers, such as photonic crystal fibers and tilted fiber Bragg gratings. The review will be of benefit to both engineers in the field of optical fiber technology and scientists in the fields of biosensing.
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243
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Miao C, Xu H, Jiang M, Liu Y, Wan P, Kan C. High performance lasing in a single ZnO microwire using Rh nanocubes. OPTICS EXPRESS 2020; 28:20920-20929. [PMID: 32680142 DOI: 10.1364/oe.395746] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/22/2020] [Indexed: 06/11/2023]
Abstract
High-purity and size-controlled Rh nanocubes (RhNCs) with plasmonic responses in the ultraviolet spectrum range were synthesized; the ultraviolet plasmonic features of RhNCs have potential applications in wide bandgap semiconductors and optoelectronic devices because of their optical tunability and stability, as well as the compatibility with neighboring semiconductor micro/nanostructures. In this work, by incorporating RhNCs, the near-band-edge emission of a single ZnO microwire is considerably enhanced. When optically pumped by a fs pulsed laser at room temperature, RhNCs-plasmon enhanced high-performance whispering gallery mode (WGM) lasing characteristics, including lower lasing threshold, higher Q-factor, and lasing output enhancement, can be achieved from a single ZnO microwire covered by RhNCs. To further probe the modulation effect of RhNCs plasmons on the lasing characteristics of the ZnO microwires, time-resolved photoluminescence (TRPL) and electromagnetic simulation analyses were also performed. Based on our results, it can be concluded that size-controlled RhNCs with ultraviolet energy-tunable plasmons have the potential for use in optoelectronic devices requiring stable and high-performance in the short wavelength spectrum band owing to their unique ultraviolet plasmonic features.
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244
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245
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Travkin E, Kiel T, Sadofev S, Kalusniak S, Busch K, Benson O. Dispersion control in a near-infrared subwavelength resonator with a tailored hyperbolic metamaterial. OPTICS LETTERS 2020; 45:3665-3668. [PMID: 32630925 DOI: 10.1364/ol.397088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 05/29/2020] [Indexed: 06/11/2023]
Abstract
We demonstrate experimentally and computationally an intricate cavity size dependence of the anomalous near-infrared mode spectrum of an ordinary optical resonator that is combined with a ZnO:Ga-based hyperbolic metamaterial (HMM). Specifically, we reveal the existence of a resonance in subwavelength-sized cavities and demonstrate control over the first-order cavity mode dispersion. We elaborate that these effects arise due to the HMM combining the mode dispersions of purely metallic and purely dielectric cavity cores into a distinct intermediate regime. By tailoring the HMM fill factor, this unique dispersion of a subwavelength resonator can be freely tuned between these two limiting cases.
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246
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Tunable localized surface plasmon resonances in MoO3−-TiO2 nanocomposites with enhanced catalytic activity for CO2 photoreduction under visible light. CHINESE JOURNAL OF CATALYSIS 2020. [DOI: 10.1016/s1872-2067(20)63566-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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247
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Naya SI, Shite Y, Tada H. Photothermal effect of antimony-doped tin oxide nanocrystals on the photocatalysis. CATAL COMMUN 2020. [DOI: 10.1016/j.catcom.2020.106044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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248
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Kim KH, Wi JH, Choe MI. Negative Refraction in the Visible and Strong Plasmonic Resonances in Photonic Structures of the Electride Material Mg 2 N. Chemphyschem 2020; 21:1541-1547. [PMID: 32500574 DOI: 10.1002/cphc.202000351] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 05/27/2020] [Indexed: 11/07/2022]
Abstract
Natural hyperbolic materials have recently attracted great attention due to their capability of supporting spatial mode frequency much higher than artificial metamaterials and the advantage that they do not require nanofabrication processes. For practical applications, however, hyperbolic bulk materials with lower optical losses in shorter wavelength range should be developed. This work presents the electronic structure and dielectric response of an electride Mg2 N, revealing that this material exhibits hyperbolic responses with low optical loss in the visible and plasmonic responses with high-quality in the near-infrared range. Negative refraction in the red spectral range has been analytically and numerically demonstrated. In particular, nanoantenna structures of Mg2 N generate strong plasmonic resonances in the near-infrared and the intensity enhancement in the gap region is one order of magnitude higher compared with silver nanoantenna due to its much higher quality factor, which can find potential applications for nanoplasmonic purposes such as single molecule detections by surface-enhanced hyper-Raman spectroscopy and nonlinear wavelength generations at the nanoscale.
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Affiliation(s)
- Kwang-Hyon Kim
- Institute of Physics, State Academy of Sciences, Unjong District, Pyongyang, Korea
| | - Ju-Hyok Wi
- Institute of Physics, State Academy of Sciences, Unjong District, Pyongyang, Korea
| | - Myong-Il Choe
- Institute of Physics, State Academy of Sciences, Unjong District, Pyongyang, Korea
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249
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Lee SY, Hwang JY. Transparent heater with meshed amorphous oxide/metal/amorphous oxide for electric vehicle applications. Sci Rep 2020; 10:9697. [PMID: 32546821 PMCID: PMC7297967 DOI: 10.1038/s41598-020-66514-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 05/18/2020] [Indexed: 12/02/2022] Open
Abstract
For electric vehicle application, one of the problems to be solved is defrosting or defogging a windshield or a side mirror without gas-fired heaters. In this paper, we report on a high performance of transparent heater with meshed amorphous-SiInZnO (SIZO)/ Ag/ amorphous-SiInZnO (SIZO) (SAS) for pure electric vehicles. We have adopted amorphous oxide materials like SIZO since SIZO is well known amorphous oxide materials showing high transparency and smooth surface roughness. With the mesh processing technology, a transparent electrode with high transmittance of 91% and low sheet resistance of 13.8 Ω/ϒ was implemented. When a 10 V supply voltage is applied to transparent heater, the transparent heater on glass substrate was heated up to 130oC in just 5 seconds and then reached to 250oC after tens of seconds due to the low sheet resistance. In addition, the SAS transparent meshed heater (TMH) showed high stability under cycling test and long time working stability test.
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Affiliation(s)
- Sang Yeol Lee
- Department of Semiconductor Engineering, Cheongju University, Cheongju, Chungbuk, 360-764, Republic of Korea.
| | - Jin Young Hwang
- Department of Semiconductor Engineering, Cheongju University, Cheongju, Chungbuk, 360-764, Republic of Korea
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250
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Nikaeen G, Yousefinejad S, Rahmdel S, Samari F, Mahdavinia S. Central Composite Design for Optimizing the Biosynthesis of Silver Nanoparticles using Plantago major Extract and Investigating Antibacterial, Antifungal and Antioxidant Activity. Sci Rep 2020; 10:9642. [PMID: 32541669 PMCID: PMC7295808 DOI: 10.1038/s41598-020-66357-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 05/19/2020] [Indexed: 11/09/2022] Open
Abstract
Central composite design (CCD) was applied to optimize the synthesis condition of silver nanoparticles (AgNPs) using the extract of Plantago major (P. major) seeds via a low cost and single-step process. The aqueous seed extract was applied as both reducing element and capping reagent for green production of AgNPs. Five empirical factors of synthesis including temperature (Temp), pH, volume of P. major extract (Vex), volume of AgNO3 solution (VAg) and synthesis time were used as independent variables of model and peak intensity of Surface Plasmon Resonance (SPR) originated from NPs as the dependent variable. The predicted optimal conditions was determined to be: Temp = 55 °C, pH = 9.9,Vex = 1.5 mL, VAg = 30 mL, time = 60 min. The characterization of the prepared AgNPs at these optimum conditions was conducted by Fourier transform infrared spectroscopy (FTIR), dynamic light scattering (DLS), transmission electron microscopy (TEM) and X-ray diffraction (XRD) to determine the surface bio-functionalities. Bio-activity of these AgNPs against bacteria and fungi were evaluated based on its assay against Micrococcus luteus, Escherichia coli and Penicillium digitatum. Furthermore, antioxidant capacity of these NPs was checked using the ferric reducing antioxidant power (FRAP) assay.
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Affiliation(s)
- Ghazal Nikaeen
- Research Center for Health Sciences, Institute of Health, Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Saeed Yousefinejad
- Research Center for Health Sciences, Institute of Health, Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Samane Rahmdel
- Nutrition Research Center, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fayezeh Samari
- Department of Chemistry, Faculty of Sciences, University of Hormozgan, 71961, Bandar Abbas, Iran
| | - Saeideh Mahdavinia
- Research Center for Health Sciences, Institute of Health, Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
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