1
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Gong T, Wei Z, Huang L, Hong Y, Li Y, Chen KL, Huang W, Zhong X, He J, Lee MY, Chang EC, Kong KV, Zhang X, Zhou Z. Fano enhancement of SERS for rapid early diagnosis of colorectal cancer. NANOSCALE ADVANCES 2024:d4na00543k. [PMID: 39364295 PMCID: PMC11446315 DOI: 10.1039/d4na00543k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2024] [Accepted: 09/12/2024] [Indexed: 10/05/2024]
Abstract
Patients benefit greatly from early detection of colorectal cancer, but present diagnostic procedures have high costs, low sensitivity, and low specificity. However, it is still difficult to develop a strategy that can effectively detect cancer early using high-throughput blood analysis. Fano resonance-boosted SERS platform label-free serum creates an effective diagnostic system at the point of care. We obtained 220 high-quality SERS serum spectral datasets from 88 healthy volunteers and 132 patients with colorectal cancer. The biomarker detected in serum was further evaluated using 100 colorectal cancer tissues and adjacent normal intestinal tissues collected from West China Biobanks, West China Hospital, Sichuan University. The results showed that in 97 out of 100 paired samples, the biomarkers were successfully detected using the SERS platform. This demonstrates that Fano resonance-based SERS is highly effective for diagnosing colorectal cancer.
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Affiliation(s)
- Tianxun Gong
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China Chengdu China
| | - Zhenjiang Wei
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China Chengdu China
| | - Libin Huang
- Laboratory of Digestive Surgery, State Key Laboratory of Biotherapy and Cancer Center, Department of Gastro-intestinal Surgery, West China Hospital, West China School of Medicine, Sichuan University China
| | - Yan Hong
- School of Materials and Energy, University of Electronic Science and Technology of China Chengdu China
| | - Yuan Li
- Laboratory of Digestive Surgery, State Key Laboratory of Biotherapy and Cancer Center, Department of Gastro-intestinal Surgery, West China Hospital, West China School of Medicine, Sichuan University China
| | - Ke-Ling Chen
- Laboratory of Digestive Surgery, State Key Laboratory of Biotherapy and Cancer Center, Department of Gastro-intestinal Surgery, West China Hospital, West China School of Medicine, Sichuan University China
| | - Wen Huang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China Chengdu China
| | - Xiaojing Zhong
- Department of Internal Medicine-Neurology, Heyuan People's Hospital China
| | - Jinzhao He
- Department of Internal Medicine-Neurology, Heyuan People's Hospital China
| | - Ming-Yi Lee
- Department of Chemistry, National Taiwan University Taipei 10617 Taiwan
| | - En-Chi Chang
- Department of Chemistry, National Taiwan University Taipei 10617 Taiwan
| | - Kien Voon Kong
- Department of Chemistry, National Taiwan University Taipei 10617 Taiwan
| | - Xiaosheng Zhang
- State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering (National Exemplary School of Microelectronics), University of Electronic Science and Technology of China Chengdu China
| | - Zongguang Zhou
- Laboratory of Digestive Surgery, State Key Laboratory of Biotherapy and Cancer Center, Department of Gastro-intestinal Surgery, West China Hospital, West China School of Medicine, Sichuan University China
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2
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Huang W, Tang J, Hao G, Zhang S, Li Q, Wu L, Xu H. Revealing the Properties of Electrically Driven Optical Antennas via Conductive Atomic Force Microscope. ACS NANO 2024; 18:22495-22502. [PMID: 39107106 DOI: 10.1021/acsnano.4c07928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/09/2024]
Abstract
Light emission from ultracompact electrically driven optical antennas (EDOAs) has garnered significant attention due to its terahertz modulation bandwidth. Typically, the EDOAs are fixed and nonadjustable once fabricated, thus hindering the attempts to investigate the influence of structural geometry on light emission properties. Here, we propose and demonstrate that the EDOAs can be constructed by carefully manipulating the gold-coated tips of atomic force microscopy operated in conductive mode into contact with the optical antennas covered by insulating film, where the position of the tunnel junction on the antenna surface can be controlled with high accuracy and flexibility. Taking gold nanorod antennas covered by HfO2 film as an example, we found that the highest light generation efficiency is obtained when the tunnel junction is located at the shoulder edge of the nanorod antenna, where the bonding dipolar surface plasmon mode in the junction is spectrally and spatially coupled with the longitudinal radiation mode of the EDOAs. Besides, position variation of the tunnel junction on the nanorod surface also strongly influences the far-field radiation angular distribution and emission spectrum. Numerical simulations are in good agreement with the experimental results. Our findings offer fundamental insights into the influence of structural parameters on the light emission performance of EDOAs, thus leading to better design of EDOAs with high light generation efficiency and powerful functionality.
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Affiliation(s)
- Weiwei Huang
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Jibo Tang
- School of Physics and Technology, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Guodong Hao
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Shunping Zhang
- School of Physics and Technology, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, China
| | - Qiang Li
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Lijun Wu
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Hongxing Xu
- School of Physics and Technology, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, China
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3
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Ayala-Orozco C, Li G, Li B, Vardanyan V, Kolomeisky AB, Tour JM. How to Build Plasmon-Driven Molecular Jackhammers that Disassemble Cell Membranes and Cytoskeletons in Cancer. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2309910. [PMID: 38183304 DOI: 10.1002/adma.202309910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 12/19/2023] [Indexed: 01/08/2024]
Abstract
Plasmon-driven molecular machines with ultrafast motion at the femtosecond scale are effective for the treatment of cancer and other diseases. It is recently shown that cyanine dyes act as molecular jackhammers (MJH) through vibronic (vibrational and electronic mode coupling) driven activation that causes the molecule to stretch longitudinally and axially through concerted whole molecule vibrations. However, the theoretical and experimental underpinnings of these plasmon-driven motions in molecules are difficult to assess. Here the use of near-infrared (NIR) light-activated plasmons in a broad array of MJH that mechanically disassemble membranes and cytoskeletons in human melanoma A375 cells is described. The characteristics of plasmon-driven molecular mechanical disassembly of supramolecular biological structures are observed and recorded using real-time fluorescence confocal microscopy. Molecular plasmon resonances in MJH are quantified through a new experimental plasmonicity index method. This is done through the measurement of the UV-vis-NIR spectra in various solvents, and quantification of the optical response as a function of the solvent polarity. Structure-activity relationships are used to optimize the synthesis of plasmon-driven MJH, applying them to eradicate human melanoma A375 cells at low lethal concentrations of 75 nm and 80 mW cm-2 of 730 nm NIR-light for 10 min.
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Affiliation(s)
| | - Gang Li
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
| | - Bowen Li
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
| | - Vardan Vardanyan
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
| | | | - James M Tour
- Department of Chemistry, Rice University, Houston, TX, 77005, USA
- Department of Materials Science and Nano Engineering, the Smalley-Curl Institute, the Nano Carbon Center, and the Rice Advanced Materials Institute, Rice University, 6100 Main St., Houston, TX, 77005, USA
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4
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Huang H, Wang H, Li S, Jiang J, Liu Y, Cai M, Shao L, Chen H, Wang J. WS 2-Flake-Sandwiched, Au-Nanodisk-Enabled High-Quality Fabry-Pérot Nanoresonators for Photoluminescence Modulation. ACS NANO 2022; 16:14874-14884. [PMID: 36036762 DOI: 10.1021/acsnano.2c05769] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The increasing demand for compact and high-performance photonic devices drives the development of optical resonators with nanoscale sizes and ultrahigh quality factors. Fabry-Pérot (FP) resonators, the most widely employed optical resonators, can support ultrahigh quality factors in the simple structure, which is particularly attractive for applications in lasers, filters, and ultrasensitive sensors. However, the construction of FP resonators with both nanoscale sizes and high quality factors has still faced challenges. Herein we demonstrate the construction of FP nanoresonators out of single Au nanodisks (NDs) and a Au film, with a WS2 flake sandwiched in between. The atomically flat surfaces of the WS2 flake and Au NDs benefit mirror alignment and boost the quality factor up to 76. The nanoresonators can support FP resonances with different mode orders in the visible region. The optical properties and formation mechanisms of the high-quality FP modes are systematically studied. The FP modes are further hybridized with excitons in the WS2 flake spacer, enabling the modulation of the WS2 indirect band gap emissions. Our study combines the advantages of plasmonic nanoparticles and FP resonators, providing a promising platform for the development of compact nanophotonic devices such as tunable nanolasers, smart sensors, and photonic-circuit elements.
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Affiliation(s)
- He Huang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, 999077, China
| | - Hao Wang
- Shenzhen JL Computational Science and Applied Research Institute, Shenzhen 518131, China
- Beijing Computational Science Research Center, Beijing 100193, China
| | - Shasha Li
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, 999077, China
- Shenzhen JL Computational Science and Applied Research Institute, Shenzhen 518131, China
- Beijing Computational Science Research Center, Beijing 100193, China
| | - Jingyao Jiang
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Yi Liu
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, 999077, China
| | - Mingyang Cai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, 999077, China
| | - Lei Shao
- Shenzhen JL Computational Science and Applied Research Institute, Shenzhen 518131, China
- Beijing Computational Science Research Center, Beijing 100193, China
| | - Huanjun Chen
- State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, 999077, China
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5
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Zhao J, Wang J, Brock AJ, Zhu H. Plasmonic heterogeneous catalysis for organic transformations. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C: PHOTOCHEMISTRY REVIEWS 2022. [DOI: 10.1016/j.jphotochemrev.2022.100539] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Kitte SA, Bushira FA, Xu C, Wang Y, Li H, Jin Y. Plasmon-Enhanced Nitrogen Vacancy-Rich Carbon Nitride Electrochemiluminescence Aptasensor for Highly Sensitive Detection of miRNA. Anal Chem 2021; 94:1406-1414. [PMID: 34927425 DOI: 10.1021/acs.analchem.1c04726] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The development of biosensors for biologically important substances with ultralow content such as microRNA is of great significance. Herein, a novel surface plasmon-enhanced electrogenerated chemiluminescence-based aptasensor was developed for ultrasensitive sensing of microRNA by using nitrogen vacancy-rich carbon nitride nanosheets as effective luminophores and gold nanoparticles as plasmonic sources. The introduction of nitrogen vacancies improved the electrochemiluminescence behavior due to improved conductance and electrogenerated chemiluminescence activity. The introduction of plasmonic gold nanoparticles increased the electrochemiluminescence signal intensity by more than eightfold. The developed surface plasmon-enhanced electrogenerated chemiluminescence aptasensor exhibited good selectivity, ultrasensitivity, excellent stability, and reproducibility for the determination of microRNA-133a, with a dynamic linear range of 1 aM to 100 pM and a limit of detection about 0.87 aM. Moreover, the surface plasmon-enhanced electrogenerated chemiluminescence sensor obtained a good recovery when detecting the content of microRNA in actual serum.
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Affiliation(s)
- Shimeles Addisu Kitte
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.,Department of Chemistry, College of Natural Sciences, Jimma University, P.O. Box 378, Jimma 378, Ethiopia
| | - Fuad Abduro Bushira
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.,Department of Chemistry, College of Natural Sciences, Jimma University, P.O. Box 378, Jimma 378, Ethiopia.,University of Science and Technology of China, Hefei 230026, P. R. China
| | - Chen Xu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.,University of Science and Technology of China, Hefei 230026, P. R. China
| | - Yong Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.,University of Science and Technology of China, Hefei 230026, P. R. China
| | - Haijuan Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.,University of Science and Technology of China, Hefei 230026, P. R. China
| | - Yongdong Jin
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.,University of Science and Technology of China, Hefei 230026, P. R. China
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7
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Zheng J, Cheng X, Zhang H, Bai X, Ai R, Shao L, Wang J. Gold Nanorods: The Most Versatile Plasmonic Nanoparticles. Chem Rev 2021; 121:13342-13453. [PMID: 34569789 DOI: 10.1021/acs.chemrev.1c00422] [Citation(s) in RCA: 184] [Impact Index Per Article: 61.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Gold nanorods (NRs), pseudo-one-dimensional rod-shaped nanoparticles (NPs), have become one of the burgeoning materials in the recent years due to their anisotropic shape and adjustable plasmonic properties. With the continuous improvement in synthetic methods, a variety of materials have been attached around Au NRs to achieve unexpected or improved plasmonic properties and explore state-of-the-art technologies. In this review, we comprehensively summarize the latest progress on Au NRs, the most versatile anisotropic plasmonic NPs. We present a representative overview of the advances in the synthetic strategies and outline an extensive catalogue of Au-NR-based heterostructures with tailored architectures and special functionalities. The bottom-up assembly of Au NRs into preprogrammed metastructures is then discussed, as well as the design principles. We also provide a systematic elucidation of the different plasmonic properties associated with the Au-NR-based structures, followed by a discussion of the promising applications of Au NRs in various fields. We finally discuss the future research directions and challenges of Au NRs.
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Affiliation(s)
- Jiapeng Zheng
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Xizhe Cheng
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Han Zhang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Xiaopeng Bai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Ruoqi Ai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
| | - Lei Shao
- Beijing Computational Science Research Center, Beijing 100193, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 999077, China
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8
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Zhao J, Xue S, Ji R, Li B, Li J. Localized surface plasmon resonance for enhanced electrocatalysis. Chem Soc Rev 2021; 50:12070-12097. [PMID: 34533143 DOI: 10.1039/d1cs00237f] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrocatalysis plays a vital role in energy conversion and storage in modern society. Localized surface plasmon resonance (LSPR) is a highly attractive approach to enhance the electrocatalytic activity and selectivity with solar energy. LSPR excitation can induce the transfer of hot electrons and holes, electromagnetic field enhancement, lattice heating, resonant energy transfer and scattering, in turn boosting a variety of electrocatalytic reactions. Although the LSPR-mediated electrocatalysis has been investigated, the underlying mechanism has not been well explained. Moreover, the efficiency is strongly dependent on the structure and composition of plasmonic metals. In this review, the currently proposed mechanisms for plasmon-mediated electrocatalysis are introduced and the preparation methods to design supported plasmonic nanostructures and related electrodes are summarized. In addition, we focus on the characterization strategies used for verifying and differentiating LSPR mechanisms involved at the electrochemical interface. Following that are highlights of representative examples of direct plasmonic metal-driven and indirect plasmon-enhanced electrocatalytic reactions. Finally, this review concludes with a discussion on the remaining challenges and future opportunities for coupling LSPR with electrocatalysis.
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Affiliation(s)
- Jian Zhao
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Song Xue
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Rongrong Ji
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Bing Li
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China.
| | - Jinghong Li
- Department of Chemistry, Key Lab of Bioorganic Phosphorus Chemistry and Chemical Biology, Tsinghua University, Beijing 100084, China.
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Liu D, Xue C. Plasmonic Coupling Architectures for Enhanced Photocatalysis. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2005738. [PMID: 33891777 DOI: 10.1002/adma.202005738] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 10/05/2020] [Indexed: 06/12/2023]
Abstract
Plasmonic photocatalysis is a promising approach for solar energy transformation. Comparing with isolated metal nanoparticles, the plasmonic coupling architectures can provide further strengthened local electromagnetic field and boosted light-harvesting capability through optimal control over the composition, spacing, and orientation of individual nanocomponents. As such, when integrated with semiconductor photocatalysts, the coupled metal nanostructures can dramatically promote exciton generation and separation through plasmonic-coupling-driven charge/energy transfer toward superior photocatalytic efficiencies. Herein, the principles of the plasmonic coupling effect are presented and recent progress on the construction of plasmonic coupling architectures and their integration with semiconductors for enhanced photocatalytic reactions is summarized. In addition, the remaining challenges as to the rational design and utilization of plasmon coupling structures are elaborated, and some prospects to inspire new opportunities on the future development of plasmonic coupling structures for efficient and sustainable light-driven reactions are raised.
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Affiliation(s)
- Dong Liu
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Can Xue
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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10
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Sun S, Wang D, Feng Z, Tan W. Highly efficient unidirectional forward scattering induced by resonant interference in a metal-dielectric heterodimer. NANOSCALE 2020; 12:22289-22297. [PMID: 33146190 DOI: 10.1039/d0nr07010f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We demonstrate that a metal-dielectric heterodimer structure can satisfy a nearly ideal first Kerker condition at a wavelength close to the resonance peak of the dimer, yielding efficient unidirectional forward scattering with a high forward-to-backward scattering ratio (≈48 dB) and remarkable enhancement of the forward scattering intensity (∼2.68 times compared to a single dielectric nanoparticle). Using a rigorous analytical dipole-dipole interaction model, the underlying mechanism is revealed, in which the originally weak electric dipole moment of the dimer is significantly enhanced owing to the strong resonant interference between the localized surface plasmon resonance of the metal and the Mie resonances of the dielectric material, which could up-match the magnetic dipole moment of the dimer at a wavelength close to the resonance peak, boosting the forward scattering efficiency. To achieve the optimal conditions, the sizes of the metal and dielectric constituents as well as the gap distance of the dimer have to be physically and delicately tuned to ensure a perfect match in both the amplitudes and phases of the electric and magnetic dipole moments of the dimer. On top of that, the loss of the heterodimer can be effectively suppressed to a level well below that of a pure metal nanoparticle, which further benefits the forward scattering efficiency. The flexibility in designing the dimer geometry and choosing metal-dielectric material combinations enables efficient unidirectional forward scattering in a broadband spectrum (UV to visible) with an intermediate gap distance (10-20 nm), greatly expanding the application scope. The proposed hybrid dimer could serve as a powerful and versatile building block in many emergent fields such as metasurfaces, nanoantennae, etc.
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Affiliation(s)
- Song Sun
- Microsystem & Terahertz Research Center, China Academy of Engineering Physics, No. 596, Yinhe Road, Shuangliu, Chengdu, China 610200.
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Kuttner C, Höller RPM, Quintanilla M, Schnepf MJ, Dulle M, Fery A, Liz-Marzán LM. SERS and plasmonic heating efficiency from anisotropic core/satellite superstructures. NANOSCALE 2019; 11:17655-17663. [PMID: 31535119 DOI: 10.1039/c9nr06102a] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The optical properties of nanoparticle assemblies can be tailored via hybridization of plasmon modes. Isotropic core/satellite superstructures made of spherical nanoparticles are known to exhibit coupled modes with a strongly scattering (radiative) character, and provide hot spots yielding high activity in surface-enhanced Raman scattering (SERS). However, to complement this functionality with plasmonic heating, additional absorbing (non-radiative) modes are required. We introduce herein anisotropic superstructures formed by decorating a central nanorod with spherical satellite nanoparticles, which feature two coupled modes that allow application for both SERS and heating. On the basis of diffuse reflectance spectroscopy, small-angle X-ray scattering (SAXS), and electromagnetic simulations, the origin of the coupled modes is disclosed and thus serves as a basis toward alternative designs of functional superstructures. This work represents a proof-of-principle for the combination of high SERS efficiency with efficient plasmonic heating by near-infrared irradiation.
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Affiliation(s)
- Christian Kuttner
- CIC biomaGUNE, BioNanoPlasmonics Laboratory, Paseo de Miramón 182, 20014 Donostia-San Sebastián, Spain.
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12
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Szekrényes DP, Pothorszky S, Zámbó D, Deák A. Detecting spatial rearrangement of individual gold nanoparticle heterodimers. Phys Chem Chem Phys 2019; 21:10146-10151. [PMID: 31062803 DOI: 10.1039/c9cp01541h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The self-assembly of properly surface-modified gold nanorods and spherical gold nanoparticles in aqueous medium results in the formation of heterodimers, which show a unique optical scattering spectrum due to the plasmon coupling between the particles. While for the majority of the heterodimers, both particles are located at the substrate level, occasionally, some spherical particles are found to be located on top of the gold nanorods instead of the supporting substrate. Based on optical measurements on such individual heterodimers, it is shown that in contrast to the plain white-light scattering spectrum, the polarization-resolved spectra allow us to distinguish between the cases when the sphere is located on top or at the side of the nanorods. This finding is utilized to investigate the structure of heterodimers upon formation in situ in aqueous medium. It is demonstrated at the individual heterodimer level that both arrangements can be found upon assembly and that the nanosphere originally located on top of the rod right after assembly can indeed rearrange and move to substrate level during drying. The results underline the importance of low-level in situ characterization approaches in the field of nanoparticle self-assembly and can be utilized to assess the impact of different surface ligands, interfacial layers and liquid environments on the drying of nanoparticle-based systems.
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Affiliation(s)
- Dániel Péter Szekrényes
- Institute of Technical Physics and Materials Science, HAS Centre for Energy Research, P.O. Box 49, H-1525 Budapest, Hungary.
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14
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Li G, Hu H, Wu L. Tailoring Fano lineshapes using plasmonic nanobars for highly sensitive sensing and directional emission. Phys Chem Chem Phys 2018; 21:252-259. [PMID: 30519701 DOI: 10.1039/c8cp05779f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Plasmonic oligomers are one class of the most promising nanoclusters for generating Fano resonances. This study reveals that a nanobar-based heptamer concurrently sustains triple polarization-dependent Fano resonances, in sharp contrast to traditional nanodisk or nanosphere-based counterparts. Benefiting from the enhanced near field and reduced spectral linewidth, the gold heptamer exhibits a high refractive index sensitivity (940 nm per RIU) together with a figure of merit (FoM) value as large as 20.9, which outperforms that of most other gold oligomers. On the other hand, it is found that the spectral positions of hybridized eigenmodes depend strongly on the spatial configurations of the constituent nanobars. As a proof of concept, we design a simple heterodimer comprising a nanocross and a nanobar, where plasmonic modes with opposite radiative decay characteristics are excellently overlapped both spectrally and spatially by elaborate tailoring. Double strong Fano resonances appear on opposite sides of the spectrum as expected. More interestingly, the radiation main lobes all point to one direction at these two Fano resonances due to the spatial charge distributions and mode interferences with the maximal directivity ratio (DR) as high as 22.4, in a similar manner to the radio frequency (RF) Yagi-Uda antenna. Furthermore, the emission directions can also be easily switched by adjusting the orientations of the individual nanobar in the heterodimer. Our study demonstrates that the nanobar-based oligomers with tailored Fano lineshapes could serve as versatile and delicate platforms for the label-free biochemical sensing and directional transmission of optical information at the nanometre scale.
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Affiliation(s)
- Guozhou Li
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China.
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15
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Ren J, Wang G, Qiu W, Chen H, Qiu P, Kan Q, Pan JQ. A flexible control on electromagnetic behaviors of graphene oligomer by tuning chemical potential. NANOSCALE RESEARCH LETTERS 2018; 13:349. [PMID: 30392036 PMCID: PMC6215537 DOI: 10.1186/s11671-018-2762-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 10/17/2018] [Indexed: 06/08/2023]
Abstract
In this work, we demonstrate that the electromagnetic properties of graphene oligomer can be drastically modified by locally modifications of the chemical potentials. The chemical potential variations of different positions in graphene oligomer have different impacts on both extinction spectra and electromagnetic fields. The flexible tailoring of the localizations of the electromagnetic fields can be achieved by precisely adjusting the chemical potentials of the graphene nanodisks at corresponding positions. The proposed nanostructures in this work lead to the practical applications of graphene-based plasmonic devices such as nanosensing, light trapping and photodetection.
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Affiliation(s)
- Junbo Ren
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen, 361021 China
| | - Guangqing Wang
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen, 361021 China
| | - Weibin Qiu
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen, 361021 China
| | - Houbo Chen
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen, 361021 China
| | - Pingping Qiu
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen, 361021 China
| | - Qiang Kan
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100086 China
- Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100086 China
| | - Jiao-Qing Pan
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing, 100086 China
- Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100086 China
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16
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Multispectral Plasmon of Anisotropic Core-shell Gold Nanorods@SiO2: Dual-band Absorption Enhancement with Coupling Dye Molecules. Chem Res Chin Univ 2018. [DOI: 10.1007/s40242-018-8120-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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17
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Yin H, Guo Y, Cui X, Lu W, Yang Z, Yang B, Wang J. Plasmonic and sensing properties of vertically oriented hexagonal gold nanoplates. NANOSCALE 2018; 10:15058-15070. [PMID: 30059125 DOI: 10.1039/c8nr04463e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Plasmonic metal nanocrystals, owing to their high sensitivity to the dielectric changes in the surrounding environment, can allow for the direct probing and monitoring of molecular binding on their surfaces. Anisotropic Au nanoplates possess high refractive index sensitivities, with their nanoscale sensing volumes located at their sharp tips and edges. One of the main challenges in molecular detection based on localized plasmon resonance is to increase the detection capability at the single-particle level. Vertically oriented Au nanoplates are more attractive candidates for developing ultrasensitive plasmonic sensors than horizontally oriented ones, as vertical Au nanoplates allow for more analyte molecules to access their sharp tips and edges. However, few reports have studied the sensing performance of vertically oriented, elongated, individual metal nanocrystals. Herein we report on the deposition of vertically oriented, hexagonal Au nanoplates on substrates and the study of their plasmonic and sensing properties. The vertically aligned nanoplates are compared with the horizontally oriented ones both experimentally and through numerical simulations. The vertically oriented nanoplates possess shorter plasmon resonance wavelengths and narrower peak widths than the horizontally oriented ones of similar sizes. The shorter plasmon wavelengths and smaller peak widths are also confirmed by knocking down the vertical Au nanoplates through mild perturbation and performing the scattering measurements beforehand and afterwards. Further scattering measurements of the Au nanoplates upon the adsorption of positively charged polyelectrolyte reveal that the vertical Au nanoplates are more sensitive to the polyelectrolyte molecules than the horizontal ones.
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Affiliation(s)
- Hang Yin
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
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18
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Devaraj V, Lee JM, Oh JW. Distinguishable Plasmonic Nanoparticle and Gap Mode Properties in a Silver Nanoparticle on a Gold Film System Using Three-Dimensional FDTD Simulations. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E582. [PMID: 30061493 PMCID: PMC6116242 DOI: 10.3390/nano8080582] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2018] [Revised: 07/13/2018] [Accepted: 07/27/2018] [Indexed: 12/12/2022]
Abstract
We present a computational study of the near-field enhancement properties from a plasmonic nanomaterial based on a silver nanoparticle on a gold film. Our simulation studies show a clear distinguishability between nanoparticle mode and gap mode as a function of dielectric layer thickness. The observed nanoparticle mode is independent of dielectric layer thickness, and hence its related plasmonic properties can be investigated clearly by having a minimum of ~10-nm-thick dielectric layer on a metallic film. In case of the gap mode, the presence of minimal dielectric layer thickness is crucial (~≤4 nm), as deterioration starts rapidly thereafter. The proposed simple tunable gap-based particle on film design might open interesting studies in the field of plasmonics, extreme light confinement, sensing, and source enhancement of an emitter.
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Affiliation(s)
- Vasanthan Devaraj
- Research Center for Energy Convergence and Technology Division, Pusan National University, Busan 46241, Korea.
| | - Jong-Min Lee
- Research Center for Energy Convergence and Technology Division, Pusan National University, Busan 46241, Korea.
| | - Jin-Woo Oh
- Research Center for Energy Convergence and Technology Division, Pusan National University, Busan 46241, Korea.
- Department of Nano Fusion Technology, Pusan National University, Busan 46241, Korea.
- Department of Nanoenergy Engineering, Pusan National University, Busan 46241, Korea.
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19
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Ren J, Wang W, Qiu W, Qiu P, Wang Z, Lin Z, Wang JX, Kan Q, Pan JQ. Dynamic tailoring of electromagnetic behaviors of graphene plasmonic oligomers by local chemical potential. Phys Chem Chem Phys 2018; 20:16695-16703. [PMID: 29877522 DOI: 10.1039/c8cp01281d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In the mid-infrared and terahertz (THz) regime, graphene supports tunable surface plasmon resonance (SPR) by controlling the chemical potential, which promotes light-matter interaction at the selected wavelength, showing exceptional promise for optoelectronic applications. In this article, we show that the electromagnetic (EM) response of graphene oligomers can be substantially modified by the modification of the local chemical potential, strengthening or reducing the intrinsic plasmonic modes. The effect mechanism is corroborated by a graphene nanocluster composed of 13 nanodisks with D6h symmetry; by transforming to D3h symmetry, the effect mechanism was retained and more available plasmonic resonance modes appeared. The intriguing properties open a new way to design nanodevices made of graphene oligomers with highly efficient photoresponse enhancement and tunable spectral selectivity for highly accurate photodetection.
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Affiliation(s)
- Junbo Ren
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China.
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20
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21
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Mokkath JH. Nanoparticle heterodimers: The role of size and interparticle gap distance on the optical response. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.03.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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22
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Zhuo X, Yip HK, Ruan Q, Zhang T, Zhu X, Wang J, Lin HQ, Xu JB, Yang Z. Broadside Nanoantennas Made of Single Silver Nanorods. ACS NANO 2018; 12:1720-1731. [PMID: 29406752 DOI: 10.1021/acsnano.7b08423] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Directional optical nanoantennas are often realized by nanostructured systems with ingenious or complex designs. Herein we report on the realization of directional scattering of visible light from a simple configuration made of single Ag nanorods supported on Si substrates, where the incident light can be routed toward the two flanks of each nanorod. Such an intriguing far-field scattering behavior, which has not been investigated so far, is proved to result from the near-field coupling between high-aspect-ratio Ag nanorods and high-refractive-index Si substrates. A simple and intuitive model is proposed, where the complicated plasmon resonance is found to be equivalent to several vertically aligned electric dipoles oscillating in phase, to understand the far-field properties of the system. The interference among the electric dipoles results in wavefront reshaping and sidewise light routing in a similar manner to the broadside antenna described in the traditional antenna theory, allowing for the naming of these Si-supported Ag nanorods as "broadside nanoantennas". We have carried out comprehensive experiments to understand the physical origins behind and the affecting factors on the directional scattering behavior of such broadside nanoantennas.
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Affiliation(s)
- Xiaolu Zhuo
- Department of Physics, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
| | - Hang Kuen Yip
- Department of Physics, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
| | - Qifeng Ruan
- Department of Physics, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
| | - Tiankai Zhang
- Department of Electronic Engineering, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
| | - Xingzhong Zhu
- Department of Physics, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
- Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University , Shanghai 200240, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
| | - Hai-Qing Lin
- Beijing Computational Science Research Center , Beijing 100193, China
| | - Jian-Bin Xu
- Department of Electronic Engineering, The Chinese University of Hong Kong , Shatin, Hong Kong SAR China
| | - Zhi Yang
- Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano Electronics, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University , Shanghai 200240, China
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23
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Mahdy MRC, Danesh M, Zhang T, Ding W, Rivy HM, Chowdhury AB, Mehmood MQ. Plasmonic Spherical Heterodimers: Reversal of Optical Binding Force Based on the Forced Breaking of Symmetry. Sci Rep 2018; 8:3164. [PMID: 29453371 PMCID: PMC5816674 DOI: 10.1038/s41598-018-21498-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 02/05/2018] [Indexed: 11/09/2022] Open
Abstract
The stimulating connection between the reversal of near-field plasmonic binding force and the role of symmetry-breaking has not been investigated comprehensively in the literature. In this work, the symmetry of spherical plasmonic heterodimer-setup is broken forcefully by shining the light from a specific side of the set-up instead of impinging it from the top. We demonstrate that for the forced symmetry-broken spherical heterodimer-configurations: reversal of lateral and longitudinal near-field binding force follow completely distinct mechanisms. Interestingly, the reversal of longitudinal binding force can be easily controlled either by changing the direction of light propagation or by varying their relative orientation. This simple process of controlling binding force may open a novel generic way of optical manipulation even with the heterodimers of other shapes. Though it is commonly believed that the reversal of near-field plasmonic binding force should naturally occur for the presence of bonding and anti-bonding modes or at least for the Fano resonance (and plasmonic forces mostly arise from the surface force), our study based on Lorentz-force dynamics suggests notably opposite proposals for the aforementioned cases. Observations in this article can be very useful for improved sensors, particle clustering and aggregation.
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Affiliation(s)
- M R C Mahdy
- Department of Electrical & Computer Engineering, North South University, Bashundhara, Dhaka, 1229, Bangladesh.
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore, Singapore.
- Pi Labs Bangladesh Ltd., ARA Bhaban, 39, Kazi Nazrul Islam Avenue, Kawran Bazar, Dhaka, Bangladesh.
| | - Md Danesh
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore, Singapore
| | - Tianhang Zhang
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, 28 Medical Drive, Singapore, 117456, Singapore
| | - Weiqiang Ding
- Department of Physics, Harbin Institute of Technology, Harbin, 150001, People's Republic of China.
| | - Hamim Mahmud Rivy
- Department of Electrical & Computer Engineering, North South University, Bashundhara, Dhaka, 1229, Bangladesh
| | - Ariful Bari Chowdhury
- Department of Public Health, North South University, Bashundhara, Dhaka, 1229, Bangladesh
| | - M Q Mehmood
- Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, 117583, Singapore, Singapore
- Department of Electrical Engineering, Information Technology University of the Punjab, 54000, Lahore, Pakistan
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24
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Ren J, Qiu W, Chen H, Qiu P, Lin Z, Wang JX, Kan Q, Pan JQ. Electromagnetic field coupling characteristics in graphene plasmonic oligomers: from isolated to collective modes. Phys Chem Chem Phys 2018; 19:14671-14679. [PMID: 28537636 DOI: 10.1039/c7cp01734k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, we propose a plasmonic tetramer composed of coupled graphene nanodisks. The transformation from the isolated to the collective modes of the proposed structure is investigated by analysing the whispering-gallery modes and extinction spectra with various inter-nanodisk gap distances. In addition, the effect of introducing a central nanodisk into the tetramer on the extinction spectra is explored, which leads to Fano resonance. Furthermore, the refractive index sensing properties of the proposed graphene plasmonic oligomer have been demonstrated. The proposed nanostructures might pave the road toward the application of graphene plasmonic oligomers in fields such as nanophotonics, and chemical or biochemical sensing.
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Affiliation(s)
- Junbo Ren
- Fujian Key Laboratory of Light Propagation and Transformation (Huaqiao University), No. 668, Jimei Avenue, Jimei District, Xiamen 361021, China.
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25
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Mokkath JH. Shapes matter: examining the optical response evolution in stretched aluminium nanoparticles via time-dependent density functional theory. Phys Chem Chem Phys 2018. [DOI: 10.1039/c7cp07151e https://doi.org/10.1039/c7cp07151e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using first-principles time-dependent density functional theory calculations, we investigate the shape-anisotropy effects on the optical response of a spherical aluminium nanoparticle subjected to a stretching process in different directions.
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26
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Mokkath JH. Shapes matter: examining the optical response evolution in stretched aluminium nanoparticles via time-dependent density functional theory. Phys Chem Chem Phys 2018. [DOI: 10.1039/c7cp07151e https:/doi.org/10.1039/c7cp07151e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
Using first-principles time-dependent density functional theory calculations, we investigate the shape-anisotropy effects on the optical response of a spherical aluminium nanoparticle subjected to a stretching process in different directions.
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27
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Mokkath JH. Optical properties of magnesium nanorods using time dependent density functional theory calculations. Phys Chem Chem Phys 2018; 20:28903-28909. [DOI: 10.1039/c8cp06100a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Plasmonic nanostructures made of Earth-abundant and low-cost metals such as aluminum and magnesium have recently emerged as a potential alternative candidate to conventional plasmonic metals such as gold and silver.
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28
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Mokkath JH. Shapes matter: examining the optical response evolution in stretched aluminium nanoparticles via time-dependent density functional theory. Phys Chem Chem Phys 2018; 20:51-55. [DOI: 10.1039/c7cp07151e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Using first-principles time-dependent density functional theory calculations, we investigate the shape-anisotropy effects on the optical response of a spherical aluminium nanoparticle subjected to a stretching process in different directions.
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29
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Microsphere Assisted Super-resolution Optical Imaging of Plasmonic Interaction between Gold Nanoparticles. Sci Rep 2017; 7:13789. [PMID: 29062012 PMCID: PMC5653755 DOI: 10.1038/s41598-017-14193-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 10/06/2017] [Indexed: 12/17/2022] Open
Abstract
Conventional far-field microscopy cannot directly resolve the sub-diffraction spatial distribution of localized surface plasmons in metal nanostructures. Using BaTiO3 microspheres as far-field superlenses by collecting the near-field signal, we can map the origin of enhanced two-photon photoluminescence signal from the gap region of gold nanosphere dimers and gold nanorod dimers beyond the diffraction limit, on a conventional far-field microscope. As the angle θ between dimer's structural axis and laser polarisation changes, photoluminescence intensity varies with a cos4θ function, which agrees quantitatively with numerical simulations. An optical resolution of about λ/7 (λ: two-photon luminescence central wavelength) is demonstrated at dimer's gap region.
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30
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Affiliation(s)
- Nina Jiang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 852, China
- College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
| | - Xiaolu Zhuo
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 852, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR 852, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen 518057, China
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31
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Qin F, Lai Y, Yang J, Cui X, Ma H, Wang J, Lin HQ. Deep Fano resonance with strong polarization dependence in gold nanoplate-nanosphere heterodimers. NANOSCALE 2017; 9:13222-13234. [PMID: 28853475 DOI: 10.1039/c7nr04524g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Plasmonic Fano resonance arises from the destructive interference between a superradiant and a subradiant plasmon mode that overlap spectrally with each other. Because of its importance in revealing many physical phenomena and its applications in sensing, metamaterials, photoswitching and spectroscopy, a variety of metal nanostructures have been fabricated to generate Fano resonance. However, few metal nanostructures can support deep Fano resonance with strong polarization dependence. Herein, we report on the observation of deep Fano resonance with strong polarization dependence in Au nanoplate-nanosphere heterodimers. Experiments and simulations reveal that the presence of a nanosphere at one side edge or one vertex of the nanoplate causes distinct Fano resonance. With increasing nanosphere sizes, the shape of the scattering spectrum becomes more asymmetric, with the Fano dip getting deeper correspondingly. When the nanosphere diameter reaches 68 nm, the Fano dip almost reaches the spectral background. Moreover, the heterodimers with the nanosphere attached to one vertex of the nanoplate exhibit Fano resonance with strong polarization dependence. Such heterodimers are very attractive for constructing polarization-controlled plasmonic Fano switches.
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Affiliation(s)
- Feng Qin
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
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32
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Liu W, Li L, Yang S, Gao J, Wang R. Self‐Assembly of Heterogeneously Shaped Nanoparticles into Plasmonic Metamolecules on DNA Origami. Chemistry 2017; 23:14177-14181. [DOI: 10.1002/chem.201703927] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Wenyan Liu
- Center for Research in Energy and Environment Missouri University of Science and Technology Rolla MO 65409 USA
| | - Ling Li
- Department of Mechanical and Aerospace Engineering Missouri University of Science and Technology Rolla MO 65409 USA
| | - Shuo Yang
- Department of Chemistry Missouri University of Science and Technology Rolla MO 65409 USA
| | - Jie Gao
- Department of Mechanical and Aerospace Engineering Missouri University of Science and Technology Rolla MO 65409 USA
| | - Risheng Wang
- Department of Chemistry Missouri University of Science and Technology Rolla MO 65409 USA
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33
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Ren J, Wang G, Qiu W, Lin Z, Chen H, Qiu P, Wang JX, Kan Q, Pan JQ. Optimization of the Fano Resonance Lineshape Based on Graphene Plasmonic Hexamer in Mid-Infrared Frequencies. NANOMATERIALS 2017; 7:nano7090238. [PMID: 28846593 PMCID: PMC5618349 DOI: 10.3390/nano7090238] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 08/18/2017] [Accepted: 08/22/2017] [Indexed: 12/20/2022]
Abstract
In this article, the lineshape of Fano-like resonance of graphene plasmonic oligomers is investigated as a function of the parameters of the nanostructures, such as disk size, chemical potential and electron momentum relaxation time in mid-infrared frequencies. Also, the mechanism of the optimization is discussed. Furthermore, the environmental index sensing effect of the proposed structure is revealed, and a figure of merit of 25.58 is achieved with the optimized graphene oligomer. The proposed nanostructure could find applications in the fields of chemical or biochemical sensing.
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Affiliation(s)
- Junbo Ren
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China.
| | - Guangqing Wang
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China.
| | - Weibin Qiu
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China.
| | - Zhili Lin
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China.
| | - Houbo Chen
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China.
| | - Pingping Qiu
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China.
| | - Jia-Xian Wang
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China.
| | - Qiang Kan
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100086, China.
- Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100086, China.
| | - Jiao-Qing Pan
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100086, China.
- Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100086, China.
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34
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Leng H, Szychowski B, Daniel MC, Pelton M. Dramatic Modification of Coupled-Plasmon Resonances Following Exposure to Electron Beams. J Phys Chem Lett 2017; 8:3607-3612. [PMID: 28722415 DOI: 10.1021/acs.jpclett.7b01601] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Studies of the plasmon resonances in individual and coupled metal nanoparticles often involve imaging of the nanostructures of interest in an electron microscope. We show that this process can dramatically modify the optical spectra of coupled plasmonic nanoparticles, illustrated here with the case of gold nanorod-nanosphere dimers. The spectral changes are due to the thin, partially conductive carbonaceous layer that deposits onto the particles during imaging. These changes are particularly significant for coupled nanoparticles with subnanometer interparticle gaps but have largely been neglected in previous studies of such structures, including studies intended to probe quantum-mechanical effects in plasmon coupling. Accounting for the effects of the carbonaceous layer will lead to a more accurate understanding of such systems.
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Affiliation(s)
- Haixu Leng
- Department of Physics, University of Maryland, Baltimore County , Baltimore, Maryland 21250, United States
| | - Brian Szychowski
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County , Baltimore, Maryland 21250, United States
| | - Marie-Christine Daniel
- Department of Chemistry and Biochemistry, University of Maryland, Baltimore County , Baltimore, Maryland 21250, United States
| | - Matthew Pelton
- Department of Physics, University of Maryland, Baltimore County , Baltimore, Maryland 21250, United States
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35
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Pothorszky S, Zámbó D, Szekrényes D, Hajnal Z, Deák A. Detecting patchy nanoparticle assembly at the single-particle level. NANOSCALE 2017; 9:10344-10349. [PMID: 28702638 DOI: 10.1039/c7nr02623d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Patchy colloidal particles offer a unique platform to explore and investigate spatially inhomogeneous colloidal interactions. In the present work we provide direct, in situ experimental observation at the single particle level on the colloidal interaction driven formation of a heterodimer, consisting of a patchy nanorod and a sphere. The gold nanorods employed during the experiments feature positively charged tip regions, while the side of the rods is covered by surface grafted PEG. The driving force of the assembly is the electric double layer interaction between the nanorod and the nanosphere possessing opposite surface charge. The great advantage of using gold heterodimers is that their optical scattering spectrum characteristics are known to be very sensitive to the actual structure of the assembly due to plasmon hybridization. This was exploited to determine the structure of the heterodimer in situ upon formation in aqueous medium. The results indicate, that despite the attractive patches being located at the nanorod tips, for the given particle pairs the spheres readily bind to the side region of the nanorods in the aqueous medium during the assembly. Finite element simulations of the electric double layer interaction reveal that this is the energetically favorable configuration for the given heterodimer. This work demonstrates the potential of in situ experiments performed at single particle level for the characterization of self-assembling structures, which can contribute to the development of rationally designed nanoscale building blocks.
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Affiliation(s)
- S Pothorszky
- Institute of Technical Physics and Materials Science, HAS Centre for Energy Research, 1121 Budapest, Konkoly-Thege M. str. 29-33, Hungary.
| | - D Zámbó
- Institute of Technical Physics and Materials Science, HAS Centre for Energy Research, 1121 Budapest, Konkoly-Thege M. str. 29-33, Hungary.
| | - D Szekrényes
- Institute of Technical Physics and Materials Science, HAS Centre for Energy Research, 1121 Budapest, Konkoly-Thege M. str. 29-33, Hungary.
| | - Z Hajnal
- Institute of Technical Physics and Materials Science, HAS Centre for Energy Research, 1121 Budapest, Konkoly-Thege M. str. 29-33, Hungary.
| | - A Deák
- Institute of Technical Physics and Materials Science, HAS Centre for Energy Research, 1121 Budapest, Konkoly-Thege M. str. 29-33, Hungary.
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Zheng Y, Liu H, Xiang J, Dai Q, Ouyang M, Tie S, Lan S. Hot luminescence from gold nanoflowers and its application in high-density optical data storage. OPTICS EXPRESS 2017; 25:9262-9275. [PMID: 28438002 DOI: 10.1364/oe.25.009262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Gold nanoflowers with feature sizes ranging from several tenths to several hundred nanometers were synthesized by using the one-pot method. They were formed by the self-organization of gold nanoparticles of several nanometers and exhibited broad extinction spectra in the near infrared spectral range. Randomly distributed hot spots originating from the strongly localized modes were generated in gold nanoflowers and their appearances exhibited strong dependences on both the polarization and wavelength of the excitation light. Under the excitation of femtosecond laser pulses, such hot spots emitted efficient hot luminescence spanning the visible to near infrared spectral range. Distinct from the hot luminescence of single hot spots formed on rough gold and silver surfaces, the hot luminescence from gold nanoflowers composed of a large number of hot spots exhibited excitation-intensity dependence quite similar to the emission spectrum. It was demonstrated that the polarization- and wavelength-dependent hot luminescence of gold nanoflowers can be utilized to realize optical data storage with high density and low energy.
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37
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Qin F, Cui X, Ruan Q, Lai Y, Wang J, Ma H, Lin HQ. Role of shape in substrate-induced plasmonic shift and mode uncovering on gold nanocrystals. NANOSCALE 2016; 8:17645-17657. [PMID: 27714128 DOI: 10.1039/c6nr06387j] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A number of plasmonic devices and applications, such as chemical and biological sensors, plasmon-enhanced solar cells, optical nanoantennas, metamaterials and metasurfaces, require the deposition of plasmonic metal nanocrystals on various substrates. Because the localized plasmon resonance modes, energies and strengths are strongly dependent on the dielectric function of the surrounding environment, the substrate is expected to largely affect the plasmonic properties of supported metal nanocrystals. Therefore, understanding the effects of the substrate on the plasmonic properties of metal nanocrystals and the roles of the involved factors will be crucial for designing various plasmonic devices that are made of metal nanocrystals deposited on different substrates. Herein we report on our study and results of the effects of substrates with distinct dielectric functions on the plasmonic properties of three types of Au nanocrystals. A combination of experiments and numerical simulations shows that the presence of a substrate causes plasmonic shifts as well as the appearance of new plasmon modes. The plasmonic shifts and the emergence of new plasmon modes are found to be dependent on the particle shape of Au nanocrystals and in turn on the fractional particle surface area that is in contact with the supporting substrate. For Au nanospheres and nanorods, plasmonic shifts, less than 100 nm, are observed on the scattering spectra by changing the supporting substrate from indium tin oxide to silicon. In comparison, a giant spectral shift of more than 300 nm is obtained for Au nanoplates. Moreover, silicon substrates induce the emergence of an out-of-plane quadrupolar mode of Au nanoplates, which interacts with an out-of-plane octupolar mode to give rise to a distinct Fano resonance. The Fano resonance is found to become stronger as the thickness of Au nanoplates is decreased. These results are of great importance for understanding the plasmonic properties of noble metal nanocrystals supported on various substrates, and for designing novel plasmonic nanostructures with desired optical properties and functions.
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Affiliation(s)
- Feng Qin
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China. and Science and Technology on High Power Microwave Laboratory, Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621900, Sichuan Province, China
| | - Ximin Cui
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
| | - Qifeng Ruan
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
| | - Yunhe Lai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
| | - Hongge Ma
- Science and Technology on High Power Microwave Laboratory, Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621900, Sichuan Province, China
| | - Hai-Qing Lin
- Beijing Computational Science Research Center, Beijing 100193, China
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38
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Lu Y, Du G, Chen F, Yang Q, Bian H, Yong J, Hou X. Tunable potential well for plasmonic trapping of metallic particles by bowtie nano-apertures. Sci Rep 2016; 6:32675. [PMID: 27666667 PMCID: PMC5036050 DOI: 10.1038/srep32675] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 07/25/2016] [Indexed: 11/11/2022] Open
Abstract
In this paper, the tunable optical trapping dependence on wavelength of incident beam is theoretically investigated based on numerical simulations. The Monte Carlo method is taken into account for exploring the trapping characteristics such as average deviation and number distribution histogram of nanoparticles. It is revealed that both the width and the depth of potential well for trapping particles can be flexibly adjusted by tuning the wavelength of the incident beam. In addition, incident wavelengths for the deepest potential well and for the strongest stiffness at bottom are separated. These phenomena are explained as the strong plasmon coupling between tweezers and metallic nanoparticles. In addition, required trapping fluence and particles’ distributions show distinctive properties through carefully modifying the incident wavelengths from 1280 nm to 1300 nm. Trapping with lowest laser fluence can be realized with
1280 nm laser and trapping with highest precision can be realized with 1300 nm laser. This work will provide theoretical support for advancing the manipulation of metallic particles and related applications such as single-molecule fluorescence and surface enhanced Raman spectroscopy.
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Affiliation(s)
- Yu Lu
- Department of Electronic Science and Technology, State Key Laboratory for Manufacturing System Engineering and Key Laboratory of Photonics Technology for Information of Shaanxi Province, School of Electronics &Information Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China
| | - Guangqing Du
- Department of Electronic Science and Technology, State Key Laboratory for Manufacturing System Engineering and Key Laboratory of Photonics Technology for Information of Shaanxi Province, School of Electronics &Information Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China
| | - Feng Chen
- Department of Electronic Science and Technology, State Key Laboratory for Manufacturing System Engineering and Key Laboratory of Photonics Technology for Information of Shaanxi Province, School of Electronics &Information Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China
| | - Qing Yang
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China
| | - Hao Bian
- Department of Electronic Science and Technology, State Key Laboratory for Manufacturing System Engineering and Key Laboratory of Photonics Technology for Information of Shaanxi Province, School of Electronics &Information Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China
| | - Jiale Yong
- Department of Electronic Science and Technology, State Key Laboratory for Manufacturing System Engineering and Key Laboratory of Photonics Technology for Information of Shaanxi Province, School of Electronics &Information Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China
| | - Xun Hou
- Department of Electronic Science and Technology, State Key Laboratory for Manufacturing System Engineering and Key Laboratory of Photonics Technology for Information of Shaanxi Province, School of Electronics &Information Engineering, Xi'an Jiaotong University, Xi'an, 710049, PR China
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Lv G, Li J, Tie SL, Lan S. Influence of a three-dimensional photonic crystal on the plasmonic properties of gold nanorods. OPTICS EXPRESS 2016; 24:14124-14137. [PMID: 27410571 DOI: 10.1364/oe.24.014124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The influence of a three-dimensional (3D) photonic crystal (PC) on the plasmonic properties of gold nanorods (GNRs), which are placed on the surface of the PC, was investigated both numerically and experimentally. The 3D PC formed by closely packed polystyrene spheres was fabricated by using a pressure controlled isothermal heating vertical deposition technique. For a GNR whose longitudinal surface plasmon resonance (LSPR) is located at the bandgap edges of the PC, a dramatic narrowing of the absorption spectrum as well as an enhancement in electric field and thus the absorption was observed. It was suggested that the small group velocities at the bandgap edges of the PC are responsible for the slow decay of the plasmonic mode in the GNR. To confirm the enhancement in the absorption of the GNRs induced by the nearby PC, we examined the two-photon-induced luminescence (TPL) of an assembly of GNRs dispersed on the surface of the PC. Under the excitation of femtosecond laser pulses which was resonant with the LSPR of GNRs, it was found that the excitation intensity necessary for melting GNRs placed on the surface of the PC was nearly one order of magnitude smaller than that for GNRs placed on the surface of a glass slide, in good agreement with the results predicted by the numerical simulations. Our findings indicate the possibility of using PCs to modify the plasmonic and optical properties of GNRs which are quite useful for the practical applications of GNRs such as nanoscale sensors and optical data storage.
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40
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Zhang Y, Sun Z, Cheng S, Yan F. Plasmon-Induced Broadband Light-Harvesting for Dye-Sensitized Solar Cells Using a Mixture of Gold Nanocrystals. CHEMSUSCHEM 2016; 9:813-819. [PMID: 27110902 DOI: 10.1002/cssc.201600110] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Indexed: 06/05/2023]
Abstract
The efficiency of dye-sensitized solar cells (DSSCs) is generally limited by the mismatch between the absorption spectrum of the photosensitizer and the solar irradiation spectrum. This work describes the use of a mixture that containing proper proportions of SiO2 coated Au nanospheres (AuNSs@SiO2 ) and Au nanorods (AuNRs@SiO2 ) (the mixture was denoted as AuNCs@SiO2 ) to enhance the sunlight utility in DSSCs. The incorporation of AuNCs@SiO2 into the TiO2 photoanode induced broadband light-harvesting at both low- and long- wavelengths and thus enhanced the photocurrent compared to that of plasmonic solar cells based on either AuNSs@SiO2 or AuNRs@SiO2 . Upon the doping of AuNCs@SiO2 , the overall power conversion efficiency (PCE) increased from 7.39 to 9.12 % for DSSCs based on organic liquid electrolytes.
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Affiliation(s)
- Ye Zhang
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China
| | - Zhe Sun
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China
| | - Si Cheng
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China.
| | - Feng Yan
- Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P.R. China.
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41
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Spectroscopic Properties of Gold Curvilinear Nanorod Arrays. PHOTONICS 2016. [DOI: 10.3390/photonics3020018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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42
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Liu SD, Leong ESP, Li GC, Hou Y, Deng J, Teng JH, Ong HC, Lei DY. Polarization-Independent Multiple Fano Resonances in Plasmonic Nonamers for Multimode-Matching Enhanced Multiband Second-Harmonic Generation. ACS NANO 2016; 10:1442-53. [PMID: 26727133 DOI: 10.1021/acsnano.5b06956] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Plasmonic oligomers composed of metallic nanoparticles are one class of the most promising platforms for generating Fano resonances with unprecedented optical properties for enhancing various linear and nonlinear optical processes. For efficient generation of second-harmonic emissions at multiple wavelength bands, it is critical to design a plasmonic oligomer concurrently having multiple Fano resonances spectrally matching the fundamental excitation wavelengths and multiple plasmon resonance modes coinciding with the harmonic wavelengths. Thus far, the realization of such a plasmonic oligomer remains a challenge. This study demonstrates both theoretically and experimentally that a plasmonic nonamer consisting of a gold nanocross surrounded by eight nanorods simultaneously sustains multiple polarization-independent Fano resonances in the near-infrared region and several higher-order plasmon resonances in the visible spectrum. Due to coherent amplification of the nonlinear excitation sources by the Fano resonances and efficient scattering-enhanced outcoupling by the higher-order modes, the second-harmonic emission of the nonamer is significantly increased at multiple spectral bands, and their spectral positions and radiation patterns can be flexibly manipulated by easily tuning the length of the surrounding nanorods in the nonamer. These results provide us with important implications for realizing ultrafast multichannel nonlinear optoelectronic devices.
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Affiliation(s)
| | - Eunice Sok Ping Leong
- Institute of Materials Research and Engineering, A*STAR , 2 Fusionopolis Way, Singapore 138634
| | - Guang-Can Li
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong, China
| | - Yidong Hou
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong, China
| | - Jie Deng
- Institute of Materials Research and Engineering, A*STAR , 2 Fusionopolis Way, Singapore 138634
| | - Jing Hua Teng
- Institute of Materials Research and Engineering, A*STAR , 2 Fusionopolis Way, Singapore 138634
| | - Hock Chun Ong
- Department of Physics, The Chinese University of Hong Kong , Hong Kong, China
| | - Dang Yuan Lei
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong, China
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43
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Liu X, Huo Y, Wang M, Gao S, Zhang C, Ning T, Jiang S, Xiong P, Man B. A sensitive 2D plasmon ruler based on Fano resonance. RSC Adv 2016. [DOI: 10.1039/c6ra12374k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this paper, we designed a 2D distance and rotation angle plasmon ruler based on Fano resonance of a trimer nanostructure, which consists of a concentric square nanoring–disk and an outside nanorod (CSRDR).
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Affiliation(s)
- Xiaoyun Liu
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Yanyan Huo
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Minghong Wang
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Saisai Gao
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Chao Zhang
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Tingyin Ning
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | - Shouzhen Jiang
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
| | | | - Baoyuan Man
- School of Physics and Electronics
- Shandong Normal University
- Jinan 250014
- China
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44
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Schubert I, Sigle W, van Aken PA, Trautmann C, Toimil-Molares ME. STEM-EELS analysis of multipole surface plasmon modes in symmetry-broken AuAg nanowire dimers. NANOSCALE 2015; 7:4935-4941. [PMID: 25690984 DOI: 10.1039/c4nr06578f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Surface plasmon coupling in nanowires separated by small gaps generates high field enhancements at the position of the gap and is thus of great interest for sensing applications. It is known that the nanowire dimensions and in particular the symmetry of the structures has strong influence on the plasmonic properties of the dimer structure. Here, we report on multipole surface plasmon coupling in symmetry-broken AuAg nanowire dimers. Our dimers, consisting of two nanowires with different lengths and separated by gaps of only 10 to 30 nm, were synthesized by pulsed electrochemical deposition in ion track-etched polymer templates. Electron energy-loss spectroscopy in scanning transmission electron microscopy allows us to resolve up to nine multipole order surface plasmon modes of these dimers spectrally separated from each other. The spectra evidence plasmon coupling between resonances of different multipole order, resulting in the generation of additional plasmonic modes. Since such complex structures require elaborated synthesis techniques, dimer structures with complex composition, morphology and shape are created. We demonstrate that finite element simulations on pure Au dimers can predict the generated resonances in the fabricated structures. The excellent agreement of our experiment on AuAg dimers with finite integration simulations using CST microwave studio manifests great potential to design complex structures for sensing applications.
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Affiliation(s)
- Ina Schubert
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, Darmstadt, Germany.
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45
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Wang H, Liu P, Ke Y, Su Y, Zhang L, Xu N, Deng S, Chen H. Janus magneto-electric nanosphere dimers exhibiting unidirectional visible light scattering and strong electromagnetic field enhancement. ACS NANO 2015; 9:436-448. [PMID: 25554917 DOI: 10.1021/nn505606x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Steering incident light into specific directions at the nanoscale is very important for future nanophotonics applications of signal transmission and detection. A prerequisite for such a purpose is the development of nanostructures with high-efficiency unidirectional light scattering properties. Here, from both theoretical and experimental sides, we conceived and demonstrated the unidirectional visible light scattering behaviors of a heterostructure, Janus dimer composed of gold and silicon nanospheres. By carefully adjusting the sizes and spacings of the two nanospheres, the Janus dimer can support both electric and magnetic dipole modes with spectral overlaps and comparable strengths. The interference of these two modes gives rise to the narrow-band unidirectional scattering behaviors with enhanced forward scattering and suppressed backward scattering. The directionality can further be improved by arranging the dimers into one-dimensional chain structures. In addition, the dimers also show remarkable electromagnetic field enhancements. These results will be important not only for applications of light emitting devices, solar cells, optical filters, and various surface enhanced spectroscopies but also for furthering our understanding on the light-matter interactions at the nanoscale.
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Affiliation(s)
- Hao Wang
- State Key Laboratory of Optoelectronic Materials and Technologies, ‡Guangdong Province Key Laboratory of Display Material and Technology, and §School of Physics and Engineering, Sun Yat-sen University , Guangzhou 510275, China
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46
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Shao L, Tao Y, Ruan Q, Wang J, Lin HQ. Comparison of the plasmonic performances between lithographically fabricated and chemically grown gold nanorods. Phys Chem Chem Phys 2015; 17:10861-70. [DOI: 10.1039/c5cp00715a] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The plasmonic performances of lithographic and chemical gold nanorods are quantitatively examined and compared through both experiments and electrodynamic simulations.
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Affiliation(s)
- Lei Shao
- Department of Physics
- The Chinese University of Hong Kong
- Hong Kong SAR
- China
| | - Yuting Tao
- Department of Physics
- The Chinese University of Hong Kong
- Hong Kong SAR
- China
| | - Qifeng Ruan
- Department of Physics
- The Chinese University of Hong Kong
- Hong Kong SAR
- China
| | - Jianfang Wang
- Department of Physics
- The Chinese University of Hong Kong
- Hong Kong SAR
- China
| | - Hai-Qing Lin
- Beijing Computational Science Research Center
- Beijing 100084
- China
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47
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Butet J, Martin OJF. Refractive index sensing with Fano resonant plasmonic nanostructures: a symmetry based nonlinear approach. NANOSCALE 2014; 6:15262-15270. [PMID: 25381752 DOI: 10.1039/c4nr05623j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Sensing using surface plasmon resonances is one of the most promising practical applications of plasmonic nanostructures and Fano resonances allow achieving a lower detection limit thanks to their narrow spectral features. However, a narrow spectral width of the subradiant mode in a plasmonic system, as observed in the weak coupling regime, is in general associated with a low modulation of the complete spectral response. In this article, we show that this limitation can be overcome by a nonlinear approach based on second harmonic generation and its dependence on symmetry at the nanoscale. The Fano resonant systems considered in this work are gold nanodolmens. Their linear and nonlinear responses are evaluated using a surface integral equation method. The numerical results demonstrate that a variation of the refractive index of the surrounding medium modifies the coupling between the dark and bright modes, resulting in a modification of the electromagnetic wave scattered at the second harmonic wavelength, especially the symmetry of the nonlinear emission. Reciprocally, we show that evaluating the asymmetry of the nonlinear emission provides a direct measurement of the gold nanodolmens dielectric environment. Interestingly, the influence of the refractive index of the surrounding medium on the nonlinear asymmetry parameter is approximately 10 times stronger than on the spectral position of the surface plasmon resonance: hence, smaller refractive index changes can be detected with this new approach. Practical details for an experimental realization of this sensing scheme are discussed and the resolution is estimated to be as low as Δn = 1.5 × 10(-3), respectively 1.5 × 10(-5), for an acquisition time of 60 s for an isolated gold nanodolmen, respectively an array of 10 × 10 nanodolmens.
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Affiliation(s)
- Jérémy Butet
- Nanophotonics and Metrology Laboratory (NAM), Swiss Federal Institute of Technology Lausanne (EPFL), 1015, Lausanne, Switzerland.
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48
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Li A, Li S. Large-volume hot spots in gold spiky nanoparticle dimers for high-performance surface-enhanced spectroscopy. NANOSCALE 2014; 6:12921-12928. [PMID: 25233050 DOI: 10.1039/c4nr03509g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Hot spots with a large electric field enhancement usually come in small volumes, limiting their applications in surface-enhanced spectroscopy. Using a finite-difference time-domain method, we demonstrate that spiky nanoparticle dimers (SNPD) can provide hot spots with both large electric field enhancement and large volumes because of the pronounced lightning rod effect of spiky nanoparticles. We find that the strongest electric fields lie in the gap region when SNPD is in a tip-to-tip (T-T) configuration. The enhancement of electric fields (|E|(2)/|E0|(2)) in T-T SNPD with a 2 nm gap can be as large as 1.21 × 10(6). And the hot spot volume in T-T SNPD is almost 7 times and 5 times larger than those in the spike dimer and sphere dimer with the same gap size of 2 nm, respectively. The hot spot volume in SNPD can be further improved by manipulating the arrangements of spiky nanoparticles, where crossed T-T SNPD provides the largest hot spot volume, which is 1.5 times that of T-T SNPD. Our results provide a strategy to obtain hot spots with both intense electric fields and large volume by adding a bulky core at one end of the spindly building block in dimers.
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Affiliation(s)
- Anran Li
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore.
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49
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Liu H, Wang Z, Huang J, Liu YJ, Fan HJ, Zheludev NI, Soci C. Plasmonic nanoclocks. NANO LETTERS 2014; 14:5162-5169. [PMID: 25088185 DOI: 10.1021/nl501997z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Plasmonic spectra of "nanoclock" metamaterials can be topologically mapped on a torus. We manufactured arrays of such a metamaterial with different "time" shown on the clocks and demonstrated that the near-infrared spectra of the nanostructures can be predictably tuned exhibiting a rich series of high-order plasmon modes, from the electric dipole to exotic electric triakontadipole that could be engaged in chemo/biosensor applications.
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Affiliation(s)
- Hailong Liu
- Centre for Disruptive Photonic Technologies, Nanyang Technological University , Singapore , 637371
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50
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Abstract
The evaluation of distances as small as few nanometers using optical waves is a very challenging task that can pave the way for the development of new applications in biotechnology and nanotechnology. In this article, we propose a new measurement method based on the control of the nonlinear optical response of plasmonic nanostructures by means of Fano resonances. It is shown that Fano resonances resulting from the coupling between a bright mode and a dark mode at the fundamental wavelength enable unprecedented and direct manipulation of the nonlinear electromagnetic sources at the nanoscale. In the case of second harmonic generation from gold nanodolmens, the different nonlinear sources distributions induced by the different coupling regimes are clearly revealed in the far-field distribution. Hence, the configuration of the nanostructure can be accurately determined in 3-dimensions by recording the wave scattered at the second harmonic wavelength. Indeed, the conformation of the different elements building the system is encoded in the nonlinear far-field distribution, making second harmonic generation a promising tool for reading 3-dimension plasmonic nanorulers. Furthemore, it is shown that 3-dimension plasmonic nanorulers can be implemented with simpler geometries than in the linear regime while providing complete information on the structure conformation, including the top nanobar position and orientation.
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Affiliation(s)
- Jérémy Butet
- Nanophotonics and Metrology Laboratory (NAM), Swiss Federal Institute of Technology Lausanne (EPFL) , 1015, Lausanne, Switzerland
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