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Cai Y, Peng W, Vana P. Gold nanoparticle ring arrays from core-satellite nanostructures made to order by hydrogen bond interactions. NANOSCALE ADVANCES 2022; 4:2787-2793. [PMID: 36132006 PMCID: PMC9417049 DOI: 10.1039/d2na00204c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 04/22/2022] [Indexed: 06/15/2023]
Abstract
Polyethylene glycol-grafted gold nanoparticles are attached to silica nanoparticle cores via hydrogen bonding in a controlled fashion, forming well-defined core-satellite structures in colloidal solution. For separating these complex structures effectively from the parental nanoparticles, a straightforward and easy protocol using glass beads has been developed. The attached gold nanoparticles show unique surface mobility on the silica core surface, which allows for nanoparticle rearrangement into a 2D ring pattern surrounding the silica nanoparticle template when the core-satellite structures are cast to a planar surface. When etching away the silica core under conditions in which the polymer shell fixes the satellites to the substrate, highly ordered ring-shaped patterns of gold nanoparticles are formed. By variation of the size of the parental particles - 13 to 28 nm for gold nanoparticles and 39 to 62 nm for silica nanoparticles - a great library of different ring-structures regarding size and particle number is accessible with relative ease. The proposed protocol is low-cost and can easily be scaled up. It moreover demonstrates the power of hydrogen bonds in polymers as a dynamic anchoring tool for creating nanoclusters with rearrangement ability. We believe that this concept constitutes a powerful strategy for the development of new and innovative nanostructures.
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Affiliation(s)
- Yingying Cai
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen Tammannstrasse 6 37077 Göttingen Germany
| | - Wentao Peng
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen Tammannstrasse 6 37077 Göttingen Germany
| | - Philipp Vana
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen Tammannstrasse 6 37077 Göttingen Germany
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2
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D’yachkov PN, D’yachkov EP. Interaction of Chiral Gold Nanotubes with an Alternating Magnetic Field. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622020036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Wang J, Yang W, Radjenovic PM, He Y, Yang Z, Li JF. Strong coupling between magnetic resonance and propagating surface plasmons at visible light frequencies. J Chem Phys 2020; 152:014702. [PMID: 31914769 DOI: 10.1063/1.5133942] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Light-matter interactions in nanostructures have shown great potential in physics, chemistry, surface science, materials science, and nanophotonics. Herein, for the first time, the feasibility of strong coupling between plasmon-induced magnetic resonant and propagating surface plasmonic modes at visible light frequencies is theoretically demonstrated. Taking advantage of the strong coupling between these modes allowed for a narrow-linewidth hybrid mode with a huge electromagnetic field enhancement to be acquired. This work can serve as a promising guide for designing a platform with strong coupling based on magnetic resonance at visible and even ultraviolet light frequencies and also offers an avenue for further exploration of strong light-matter interactions at the nanoscale.
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Affiliation(s)
- Jingyu Wang
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Weimin Yang
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Petar M Radjenovic
- State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Yonglin He
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Zhilin Yang
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
| | - Jian-Feng Li
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Jiujiang Research Institute, Xiamen University, Xiamen 361005, China
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5
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Tsurimaki Y, Boriskina SV, Huang Y, Chen G. Spectral, spatial and polarization-selective perfect absorbers with large magnetic response for sensing and thermal emission control. OPTICS EXPRESS 2019; 27:A1041-A1059. [PMID: 31510490 DOI: 10.1364/oe.27.0a1041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 06/17/2019] [Indexed: 06/10/2023]
Abstract
Spectral, spatial, and polarization selective perfect absorption of light in periodic metal-dielectric-metal nanoslits, each of which supporting a single electric-field anti-symmetric surface mode, is systematically studied. Our numerical analysis shows complete absorption of p-polarized light associated with large magnetic field enhancement at wavelengths from the visible to the mid-infrared range and roles played by the geometrical parameters of the structure. This understanding is then applied to the design of the structure with multiple nanoslits in a period that exhibits complete absorption at multiple wavelengths. Semi-analytical expression of the zeroth mode reflectance is derived, which shows a good agreement with numerical simulations and yields clear insight into the underlying physics of light-matter interactions in the structure.
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6
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Chow TH, Lai Y, Cui X, Lu W, Zhuo X, Wang J. Colloidal Gold Nanorings and Their Plasmon Coupling with Gold Nanospheres. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1902608. [PMID: 31304668 DOI: 10.1002/smll.201902608] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 06/20/2019] [Indexed: 05/18/2023]
Abstract
Gold nanorings are attractive as plasmonic metal nanocrystals because they have a hollow inner cavity. Their enhanced electric field inside the ring cavity is accessible, which is highly desirable for assembling with other optical components and studying their plasmon-coupling behaviors. However, the lack of robust methods for synthesizing size-controllable and uniform Au nanorings severely impedes the study of their attractive plasmonic properties and plasmon-driven applications. Herein, an improved wet-chemistry method is reported for the synthesis of monodisperse colloidal Au nanorings. Using circular Au nanodisks with different thicknesses and diameters as templates, Au nanorings are synthesized with thicknesses varied from ≈30 to ≈50 nm and cavity sizes varied from ≈90 to ≈40 nm. The produced Au nanorings are assembled with colloidal Au nanospheres to yield Au nanoring-nanosphere heterodimers in sphere-in-ring and sphere-on-ring configurations on substrates. The sphere-in-ring heterodimers exhibit the interesting feature of plasmonic Fano resonance upon the excitation of the dark quadrupolar plasmon mode of the Au nanorings. The open cavity in a nanoring holds a great promise for studying plasmon-coupled systems, which will facilitate the construction of advanced metamaterials and high-performance Fano-based devices.
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Affiliation(s)
- Tsz Him Chow
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China, China
| | - Yunhe Lai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China, China
| | - Ximin Cui
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China, China
| | - Wenzheng Lu
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China, China
| | - Xiaolu Zhuo
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China, China
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7
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Chen S, Zhang Y, Shih TM, Yang W, Hu S, Hu X, Li J, Ren B, Mao B, Yang Z, Tian Z. Plasmon-Induced Magnetic Resonance Enhanced Raman Spectroscopy. NANO LETTERS 2018; 18:2209-2216. [PMID: 29504760 DOI: 10.1021/acs.nanolett.7b04385] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Plasmon-induced magnetic resonance has shown great potentials in optical metamaterials, chemical (bio)-sensing, and surface-enhanced spectroscopies. Here, we have theoretically and experimentally revealed (1) a correspondence of the strongest near-field response to the far-field scattering valley and (2) a significant improvement in Raman signals of probing molecules by the plasmon-induced magnetic resonance. These revelations are accomplished by designing a simple and practical metallic nanoparticle-film plasmonic system that generates magnetic resonances at visible-near-infrared frequencies. Our work may provide new insights for understanding the enhancement mechanism of various plasmon-enhanced spectroscopies and also helps further explore light-matter interactions at the nanoscale.
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Affiliation(s)
- Shu Chen
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices , Xiamen University , Xiamen 361005 , China
| | - Yuejiao Zhang
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
| | - Tien-Mo Shih
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices , Xiamen University , Xiamen 361005 , China
| | - Weimin Yang
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices , Xiamen University , Xiamen 361005 , China
| | - Shu Hu
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
| | - Xiaoyan Hu
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
| | - Jianfeng Li
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices , Xiamen University , Xiamen 361005 , China
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
| | - Bin Ren
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
| | - Bingwei Mao
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
| | - Zhilin Yang
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices , Xiamen University , Xiamen 361005 , China
| | - Zhongqun Tian
- MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, State Key Laboratory of Physical Chemistry of Solid Surfaces, iChEM, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen , 361005 , China
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8
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Liu B, Tang C, Chen J, Yan Z, Zhu M, Sui Y, Tang H. The Coupling Effects of Surface Plasmon Polaritons and Magnetic Dipole Resonances in Metamaterials. NANOSCALE RESEARCH LETTERS 2017; 12:586. [PMID: 29124431 PMCID: PMC5680391 DOI: 10.1186/s11671-017-2350-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 10/24/2017] [Indexed: 05/29/2023]
Abstract
We numerically investigate the coupling effects of surface plasmon polaritons (SPPs) and magnetic dipole (MD) resonances in metamaterials, which are composed of an Ag nanodisk array and a SiO2 spacer on an Ag substrate. The periodicity of the Ag nanodisk array leads to the excitation of SPPs at the surface of the Ag substrate. The near-field plasmon interactions between individual Ag nanodisks and the Ag substrate form MD resonances. When the excitation wavelengths of SPPs are tuned to approach the position of MD resonances by changing the array period of Ag nanodisks, SPPs and MD resonances are coupled together into two hybridized modes, whose positions can be well predicted by a coupling model of two oscillators. In the strong coupling regime of SPPs and MD resonances, the hybridized modes exhibit an obvious anti-crossing, resulting into an interesting phenomenon of Rabi splitting. Moreover, the magnetic fields under the Ag nanodisks are greatly enhanced, which may find some potential applications, such as magnetic nonlinearity.
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Affiliation(s)
- Bo Liu
- School of Mathematics and Physics, Jiangsu University of Technology, Changzhou, 213001, China
| | - Chaojun Tang
- Center for Optics and Optoelectronics Research, Collaborative Innovation Center for Information Technology in Biological and Medical Physics, College of Science, Zhejiang University of Technology, Hangzhou, 310023, China.
| | - Jing Chen
- College of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing, 210023, China.
- State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, 210096, China.
- National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing, 210093, China.
| | - Zhendong Yan
- National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing, 210093, China
| | - Mingwei Zhu
- National Laboratory of Solid State Microstructures and Department of Materials Science and Engineering, Nanjing University, Nanjing, 210093, China
| | - Yongxing Sui
- School of Mathematics and Physics, Jiangsu University of Technology, Changzhou, 213001, China
| | - Huang Tang
- School of Mathematics and Physics, Jiangsu University of Technology, Changzhou, 213001, China
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9
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Nepomnyashchii A, Kuchmizhak A, Gurbatov S, Vitrik O, Kulchin Y. Single-shot Laser-assisted Nanofabrication of Plasmonic Nanorings. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.phpro.2017.01.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Jang YH, Jang YJ, Kim S, Quan LN, Chung K, Kim DH. Plasmonic Solar Cells: From Rational Design to Mechanism Overview. Chem Rev 2016; 116:14982-15034. [PMID: 28027647 DOI: 10.1021/acs.chemrev.6b00302] [Citation(s) in RCA: 261] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Plasmonic effects have been proposed as a solution to overcome the limited light absorption in thin-film photovoltaic devices, and various types of plasmonic solar cells have been developed. This review provides a comprehensive overview of the state-of-the-art progress on the design and fabrication of plasmonic solar cells and their enhancement mechanism. The working principle is first addressed in terms of the combined effects of plasmon decay, scattering, near-field enhancement, and plasmonic energy transfer, including direct hot electron transfer and resonant energy transfer. Then, we summarize recent developments for various types of plasmonic solar cells based on silicon, dye-sensitized, organic photovoltaic, and other types of solar cells, including quantum dot and perovskite variants. We also address several issues regarding the limitations of plasmonic nanostructures, including their electrical, chemical, and physical stability, charge recombination, narrowband absorption, and high cost. Next, we propose a few potentially useful approaches that can improve the performance of plasmonic cells, such as the inclusion of graphene plasmonics, plasmon-upconversion coupling, and coupling between fluorescence resonance energy transfer and plasmon resonance energy transfer. This review is concluded with remarks on future prospects for plasmonic solar cell use.
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Affiliation(s)
- Yoon Hee Jang
- Department of Chemistry and Nano Science, School of Natural Sciences, Ewha Womans University , 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Yu Jin Jang
- Department of Chemistry and Nano Science, School of Natural Sciences, Ewha Womans University , 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Seokhyoung Kim
- Department of Chemistry and Nano Science, School of Natural Sciences, Ewha Womans University , 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Li Na Quan
- Department of Chemistry and Nano Science, School of Natural Sciences, Ewha Womans University , 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Kyungwha Chung
- Department of Chemistry and Nano Science, School of Natural Sciences, Ewha Womans University , 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Dong Ha Kim
- Department of Chemistry and Nano Science, School of Natural Sciences, Ewha Womans University , 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
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11
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Yong Z, Zhang S, Gong C, He S. Narrow band perfect absorber for maximum localized magnetic and electric field enhancement and sensing applications. Sci Rep 2016; 6:24063. [PMID: 27046540 PMCID: PMC4820729 DOI: 10.1038/srep24063] [Citation(s) in RCA: 138] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 03/16/2016] [Indexed: 01/24/2023] Open
Abstract
Plasmonics offer an exciting way to mediate the interaction between light and matter, allowing strong field enhancement and confinement, large absorption and scattering at resonance. However, simultaneous realization of ultra-narrow band perfect absorption and electromagnetic field enhancement is challenging due to the intrinsic high optical losses and radiative damping in metals. Here, we propose an all-metal plasmonic absorber with an absorption bandwidth less than 8 nm and polarization insensitive absorptivity exceeding 99%. Unlike traditional Metal-Dielectric-Metal configurations, we demonstrate that the narrowband perfect absorption and field enhancement are ascribed to the vertical gap plasmonic mode in the deep subwavelength scale, which has a high quality factor of 120 and mode volume of about 10(-4) × (λres/n)(3). Based on the coupled mode theory, we verify that the diluted field enhancement is proportional to the absorption, and thus perfect absorption is critical to maximum field enhancement. In addition, the proposed perfect absorber can be operated as a refractive index sensor with a sensitivity of 885 nm/RIU and figure of merit as high as 110. It provides a new design strategy for narrow band perfect absorption and local field enhancement, and has potential applications in biosensors, filters and nonlinear optics.
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Affiliation(s)
- Zhengdong Yong
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou 310058, China
| | - Senlin Zhang
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou 310058, China
| | - Chensheng Gong
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou 310058, China
| | - Sailing He
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentations, Zhejiang University, Hangzhou 310058, China
- Department of Electromagnetic Engineering, School of Electrical Engineering, Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden
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12
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Kuchmizhak A, Gurbatov S, Vitrik O, Kulchin Y, Milichko V, Makarov S, Kudryashov S. Ion-beam assisted laser fabrication of sensing plasmonic nanostructures. Sci Rep 2016; 6:19410. [PMID: 26776569 PMCID: PMC4726055 DOI: 10.1038/srep19410] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Accepted: 12/10/2015] [Indexed: 11/28/2022] Open
Abstract
Simple high-performance, two-stage hybrid technique was developed for fabrication of different plasmonic nanostructures, including nanorods, nanorings, as well as more complex structures on glass substrates. In this technique, a thin noble-metal film on a dielectric substrate is irradiated by a single tightly focused nanosecond laser pulse and then the modified region is slowly polished by an accelerated argon ion (Ar+) beam. As a result, each nanosecond laser pulse locally modifies the initial metal film through initiation of fast melting and subsequent hydrodynamic processes, while the following Ar+-ion polishing removes the rest of the film, revealing the hidden topography features and fabricating separate plasmonic structures on the glass substrate. We demonstrate that the shape and lateral size of the resulting functional plasmonic nanostructures depend on the laser pulse energy and metal film thickness, while subsequent Ar+-ion polishing enables to vary height of the resulting nanostructures. Plasmonic properties of the fabricated nanostructures were characterized by dark-field micro-spectroscopy, Raman and photoluminescence measurements performed on single nanofeatures, as well as by supporting numerical calculations of the related electromagnetic near-fields and Purcell factors. The developed simple two-stage technique represents a new step towards direct large-scale laser-induced fabrication of highly ordered arrays of complex plasmonic nanostructures.
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Affiliation(s)
- Aleksandr Kuchmizhak
- School of Natural Sciences, Far Eastern Federal University, 8 Sukhanova str., Vladivostok 690041, Russia.,Institute of Automation and Control Processes, Far Eastern Branch, Russian Academy of Science, 5 Radio str., Vladivostok 690041, Russia
| | - Stanislav Gurbatov
- School of Natural Sciences, Far Eastern Federal University, 8 Sukhanova str., Vladivostok 690041, Russia.,Institute of Automation and Control Processes, Far Eastern Branch, Russian Academy of Science, 5 Radio str., Vladivostok 690041, Russia
| | - Oleg Vitrik
- School of Natural Sciences, Far Eastern Federal University, 8 Sukhanova str., Vladivostok 690041, Russia.,Institute of Automation and Control Processes, Far Eastern Branch, Russian Academy of Science, 5 Radio str., Vladivostok 690041, Russia
| | - Yuri Kulchin
- Institute of Automation and Control Processes, Far Eastern Branch, Russian Academy of Science, 5 Radio str., Vladivostok 690041, Russia
| | | | | | - Sergey Kudryashov
- ITMO University, St. Petersburg 197101, Russia.,Lebedev Physical Institute, Russian Academy of Science, Moscow 119991, Russia
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13
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Low-Cost, Disposable, Flexible and Highly Reproducible Screen Printed SERS Substrates for the Detection of Various Chemicals. Sci Rep 2015; 5:10208. [PMID: 25974125 PMCID: PMC4431467 DOI: 10.1038/srep10208] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 04/07/2015] [Indexed: 12/04/2022] Open
Abstract
Ideal SERS substrates for sensing applications should exhibit strong signal enhancement, generate a reproducible and uniform response, and should be able to fabricate in large-scale and low-cost. Herein, we demonstrate low-cost, highly sensitive, disposable and reproducible SERS substrates by means of screen printing Ag nanoparticles (NPs) on a plastic PET (Polyethylene terephthalate) substrates. While there are many complex methods for the fabrication of SERS substrates, screen printing is suitable for large-area fabrication and overcomes the uneven radial distribution. Using as-printed Ag substrates as the SERS platform, detection of various commonly known chemicals have been done. The SERS detection limit of Rhodamine 6G (R6G) is higher than the concentration of 1 × 10−10 M. The relative standard deviation (RSD) value for 784 points on the detection of R6G and Malachite green (MG) is less than 20% revealing a homogeneous SERS distribution and high reproducibility. Moreover, melamine (MA) is detected in fresh liquid-milk without additional pretreatment, which may accelerate the application of rapid on-line detection of MA in liquid milk. Our screen printing method highlights the use of large-scale printing strategies for the fabrication of well-defined functional nanostructures with applications well beyond the field of SERS sensing.
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14
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Verre R, Yang ZJ, Shegai T, Käll M. Optical magnetism and plasmonic Fano resonances in metal-insulator-metal oligomers. NANO LETTERS 2015; 15:1952-8. [PMID: 25621936 DOI: 10.1021/nl504802r] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The possibility of achieving optical magnetism at visible frequencies using plasmonic nanostructures has recently been a subject of great interest. The concept is based on designing structures that support plasmon modes with electron oscillation patterns that imitate current loops, that is, magnetic dipoles. However, the magnetic resonances are typically spectrally narrow, thereby limiting their applicability in, for example, metamaterial designs. We show that a significantly broader magnetic response can be realized in plasmonic pentamers constructed from metal-insulator-metal (MIM) sandwich particles. Each MIM unit acts as a magnetic meta-atom and the optical magnetism is rendered quasi-broadband through hybridization of the in-plane modes. We demonstrate that scattering spectra of individual MIM pentamers exhibit multiple Fano resonances and a broad subradiant spectral window that signals the magnetic interaction and a hierarchy of coupling effects in these intricate three-dimensional nanoparticle oligomers.
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Affiliation(s)
- R Verre
- Department of Applied Physics, Chalmers University of Technology , 41296 Göteborg, Sweden
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15
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Toal B, McMillen M, Murphy A, Hendren W, Arredondo M, Pollard R. Optical and magneto-optical properties of gold core cobalt shell magnetoplasmonic nanowire arrays. NANOSCALE 2014; 6:12905-12911. [PMID: 25230928 DOI: 10.1039/c4nr03792h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this work we present core-shell nanowire arrays of gold coated with a nanometric layer of cobalt. Despite the extremely small Co volume, these core-shell nanowires display large magneto-optical activity and plasmonic resonance determined by the geometry of the structure. Therefore, we are able to tune both the plasmonic and magneto-optical response in the visible range. Through optical and ellipsometric measurements in transmission, and applying a magnetic field to the sample, it is possible to modulate the value of the phase angle (Del {Δ}) between the S and P polarised components. It was found that the core-shell sample produced an order of magnitude larger variation in Del with changing magnetic field direction, compared with hollow cobalt tubes. The enhancement of magneto optical properties through the plasmonic nature of the gold core is complemented with the ability to induce magnetic influence over optical properties via an externally applied field. Moreover, we demonstrate for the first time the ability to use the remanent magnetisation of the Co, in conjunction with the optical properties defined by the Au, to observe remanent optical states in this uniquely designed structure. This new class of magnetoplasmonic metamaterial has great potential in a wide range of applications, from bio-sensing to data storage due to the tuneable nature of multiple resonance modes and dual functionality.
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Affiliation(s)
- B Toal
- Queens University Belfast, University Road, Belfast, BT7 1NN, UK.
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16
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Ci X, Wu B, Liu Y, Chen G, Wu E, Zeng H. Magnetic-based Fano resonance of hybrid silicon-gold nanocavities in the near-infrared region. OPTICS EXPRESS 2014; 22:23749-23758. [PMID: 25321953 DOI: 10.1364/oe.22.023749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Direct interference between the orthogonal electric and magnetic modes in a hybrid silicon-gold nanocavity is demonstrated to induce a pronounced asymmetric magnetic-based Fano resonance in the total scattering spectrum at near-infrared frequencies. Differing from the previously reported magnetic-based Fano resonances in metal nanoparticle clusters, the narrow discrete mode provided by the silicon magnetic dipole resonance can be directly excited by external illumination, and greatly enhanced electric and magnetic fields are simultaneously obtained at the Fano dip.
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17
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Wang H, O'Dea K, Wang L. Selective absorption of visible light in film-coupled nanoparticles by exciting magnetic resonance. OPTICS LETTERS 2014; 39:1457-1460. [PMID: 24690812 DOI: 10.1364/ol.39.001457] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We numerically demonstrate selective absorption of visible light in film-coupled nanoparticle metamaterials by excitation of magnetic resonance. The physical mechanism of magnetic resonance is elucidated with the help of electromagnetic field distribution. Resonance wavelengths are shown to be strongly dependent on geometric parameters. Representative inductor-capacitor models are employed to further confirm the underlying mechanism and explain the unique behaviors of magnetic resonance in film-coupled nanoparticle metamaterials.
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Tang J, He S. Hybrid metal-dielectric ring resonators for homogenizable optical metamaterials with strong magnetic response at short wavelengths down to the ultraviolet range. OPTICS EXPRESS 2013; 21:23511-23521. [PMID: 24104264 DOI: 10.1364/oe.21.023511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We derive an analytical LC model from Maxwell's equations for the magnetic resonance of subwavelength ring resonators. Using the LC model, we revisit the scaling of split-ring resonators. Inspired by the LC model, we propose a hybrid metal-dielectric ring resonator mainly composed of high index dielectric material (e.g., TiO₂) with some gaps filled with metal (e.g., Ag). The saturation frequency of magnetic response for the hybrid metal-dielectric ring resonator is much higher (up to the ultraviolet range) than that for split-ring resonators, and can be controlled by the metal fraction in the ring. The hybrid metal-dielectric ring resonator can also overcome the homogenization problem of all-dielectric magnetic resonators, and therefore can form homogenizable magnetic metamaterials at short wavelengths down to the ultraviolet range.
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Yu P, Chen S, Li J, Cheng H, Li Z, Tian J. Co-enhancing and -confining the electric and magnetic fields of the broken-nanoring and the composite nanoring by azimuthally polarized excitation. OPTICS EXPRESS 2013; 21:20611-20619. [PMID: 24103933 DOI: 10.1364/oe.21.020611] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We present a novel broken-nanoring, which can realize strongly localized confinement and highly enhancement for both electric and magnetic fields at two resonant modes excited by normal incident azimuthally polarized light. Two resonant modes of the broken-nanoring are formed by different resonant mechanisms as different resonant lengths. The physical model for two resonant modes is also proposed to explain the mechanisms of the electromagnetic enhancement. The enhancement of the electric and magnetic fields can be further improved by adding a nanoring at the outside of the broken-nanoring to form a composite nanoring, which can freely tune or easily merge the resonant modes of the solitary broken-nanoring while keeping larger enhancement of the electric and magnetic fields.
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