1
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Huang Z, Lin X, Lu Z, Du R, Tang J, Zhou L, Zhang S. Identifying high-order plasmon modes in silver nanoparticle-over-mirror configuration. OPTICS EXPRESS 2024; 32:19746-19756. [PMID: 38859102 DOI: 10.1364/oe.522105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 04/16/2024] [Indexed: 06/12/2024]
Abstract
Metallic nanoparticle-over-mirror (NPOM) represents as a versatile plasmonic configuration for surface enhanced spectroscopy, sensing and light-emitting metasurfaces. However, experimentally identifying the high-order localized surface plasmon modes in NPOM, especially for the best plasmonic material silver, is often hindered by the small scattering cross-section of high-order plasmon modes and the poor reproducibility of the spectra across different NPOMs, resulted from the polyhedral morphology of the colloidal nanoparticles or the rough surface of deposited polycrystalline metals. In this study, we identify the high-order localized surface plasmon modes in silver NPOM by using differential reflection spectroscopy. We achieved reproducible single-particle absorption spectra by constructing uniform NPOM consisting of silver nanospheres, single-crystallized silver microplates, and a self-assembled monolayer of 1,10-decanedithiol. For comparison, silver NPOM created from typical polycrystalline films exhibits significant spectral fluctuations, even when employing template stripping methods to minimize the film roughness. Identifying high-order plasmon modes in the NPOM configuration offers a pathway to construct high-quality plasmonic substrates for applications such as colloidal metasurface, surface-enhanced Raman spectroscopy, fluorescence, or infrared absorption.
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2
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Zong X, Li L, Liu Y. Merging bound states in the continuum in all-dielectric metasurfaces for ultrahigh-Q resonances. OPTICS LETTERS 2023; 48:5045-5048. [PMID: 37773381 DOI: 10.1364/ol.504476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 09/10/2023] [Indexed: 10/01/2023]
Abstract
The concept of symmetry-protected bound states in the continuum (BICs) offers a simple approach to engineer metasurfaces with high-quality (Q) factors. However, traditional designs driven by symmetry-protected BICs require an extremely small perturbation parameter to obtain very large Q factors, complicating fabrication and limiting practical applications. Here, we demonstrate a BIC-driven structure composed of two coupled all-dielectric metasurfaces that enables ultrahigh-Q resonances even at large perturbations. The underlying mechanism enabling this is to merge the symmetry-protected BIC and Fabry-Pérot BIC in the parameter space by tuning the distance between the two metasurfaces, thereby altering the intrinsic radiation behavior of the isolated symmetry-protected BIC. It is found that this simple strategy results in Q factors that are three orders of magnitude higher than those with isolated-BIC configurations. Our approach provides a promising route for designing high-Q BIC nanostructures promising in exciting device applications as sensors and filters.
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3
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Lee YM, Kim SE, Park JE. Strong coupling in plasmonic metal nanoparticles. NANO CONVERGENCE 2023; 10:34. [PMID: 37470924 PMCID: PMC10359241 DOI: 10.1186/s40580-023-00383-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/08/2023] [Indexed: 07/21/2023]
Abstract
The study of strong coupling between light and matter has gained significant attention in recent years due to its potential applications in diverse fields, including artificial light harvesting, ultraefficient polariton lasing, and quantum information processing. Plasmonic cavities are a compelling alternative of conventional photonic resonators, enabling ultracompact polaritonic systems to operate at room temperature. This review focuses on colloidal metal nanoparticles, highlighting their advantages as plasmonic cavities in terms of their facile synthesis, tunable plasmonic properties, and easy integration with excitonic materials. We explore recent examples of strong coupling in single nanoparticles, dimers, nanoparticle-on-a-mirror configurations, and other types of nanoparticle-based resonators. These systems are coupled with an array of excitonic materials, including atomic emitters, semiconductor quantum dots, two-dimensional materials, and perovskites. In the concluding section, we offer perspectives on the future of strong coupling research in nanoparticle systems, emphasizing the challenges and potentials that lie ahead. By offering a thorough understanding of the current state of research in this field, we aim to inspire further investigations and advances in the study of strongly coupled nanoparticle systems, ultimately unlocking new avenues in nanophotonic applications.
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Affiliation(s)
- Yoon-Min Lee
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju, 61005, Korea
| | - Seong-Eun Kim
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju, 61005, Korea
| | - Jeong-Eun Park
- Department of Chemistry, Gwangju Institute of Science and Technology, Gwangju, 61005, Korea.
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4
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Yang P, Liang Y, Zhang D, Ge S, Li S, Liang X, Zhang J, Xi Y, Zhang Y, Liu W. Rebuildable Silver Nanoparticles Employed as Seeds for Synthesis of Pure Silver Nanopillars with Hexagonal Cross-Sections under Room Temperature. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1263. [PMID: 37049356 PMCID: PMC10097324 DOI: 10.3390/nano13071263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/30/2023] [Accepted: 03/30/2023] [Indexed: 06/19/2023]
Abstract
Silver nanopillars with strong plasmonic effects are used for localized electromagnetic field enhancement and regulation and have wide potential applications in sensing, bioimaging, and surface-enhanced spectroscopy. Normally, the controlled synthesis of silver nanopillars is mainly achieved using heterometallic nanoparticles, including Au nanobipyramids and Pd decahedra, as seeds for inducing nanostructure growth. However, the seed materials are usually doped in silver nanopillar products. Herein, the synthesis of pure silver nanopillars with hexagonal cross-sections is achieved by employing rebuildable silver nanoparticles as seeds. An environmentally friendly, stable, and reproducible synthetic route for obtaining silver nanopillars is proposed using sodium dodecyl sulfate as the surface stabilizer. Furthermore, the seed particles induce the formation of regular structures at different temperatures, and, specifically, room temperature is beneficial for the growth of nanopillars. The availability of silver nanoparticle seeds using sodium alginate as a carrier at different temperatures was verified. A reproducible method was developed to synthesize pure silver nanopillars from silver nanoparticles at room temperature, which can provide a strategy for designing plasmonic nanostructures for chemical and biological applications.
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Affiliation(s)
- Pengfei Yang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| | - Yu Liang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
| | - Daxiao Zhang
- School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Shaobo Ge
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| | - Shijie Li
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| | - Xichao Liang
- Research and Application of Regenerative Cellulose Fiber Key Laboratory of Sichuan Province, YiBin Grace Group Co., Ltd., Yibin 644000, China
| | - Jin Zhang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| | - Yingxue Xi
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| | - Yan Zhang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
| | - Weiguo Liu
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, Xi’an Technological University, Xi’an 710032, China
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5
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Zhang H, Wang Q, Hou L, Xiao F, Zhao J. Selective triggering in-plane and out-of-plane dipolar modes of hexagonal Au nanoplate with the polarization of excitation beam. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:505302. [PMID: 36279871 DOI: 10.1088/1361-648x/ac9d18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
The dipolar responses of a single hexagonal Au nanoplate are investigated under the illuminations of linearly polarized beam and tightly focused radially polarized beam (RPB). It is found from the scattering spectra that the in-plane and out-of-plane electric dipole modes can be selectively triggered with a linearly polarized beam and tightly focused RPB, respectively. The features of these two dipolar modes are further confirmed in terms of electrical field and charge maps by the finite-difference time-domain simulation. Additionally, using the multipole expansion method, the existence of the out-of-plane dipole mode is further verified by the fact that thez-component of electric dipole response has a dominant contribution to the scattered power. Moreover, by combining the back focal plane imaging technique with the simulation, the appearance of in-plane and out-of-plane dipoles in the scattering pattern are clearly discerned. Our results provide an efficient method for selectively exciting the in-plane and out-of-plane dipolar modes of the nanoplate. We envision that the ease of tuning the dipolar momentum may facilitate the enhancement of the interaction between the plasmon and emitters at single-particle level.
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Affiliation(s)
- Hanmou Zhang
- Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, People's Republic of China
| | - Qifa Wang
- Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, People's Republic of China
| | - Liping Hou
- Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, People's Republic of China
| | - Fajun Xiao
- Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, People's Republic of China
| | - Jianlin Zhao
- Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, People's Republic of China
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6
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Zhuo X, Li S, Li N, Cheng X, Lai Y, Wang J. Mode-dependent energy exchange between near- and far-field through silicon-supported single silver nanorods. NANOSCALE 2022; 14:8362-8373. [PMID: 35635072 DOI: 10.1039/d2nr01402e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Optical antenna effects endow plasmonic nanoparticles with the capability to enhance and control various types of light-matter interaction. Most reported plasmonic systems can be regarded as single-channel nanoantennas, which rely only on a bright dipole plasmon mode for energy exchange between near- and far-field. Herein we demonstrate a dual-channel plasmonic system that can separate the excitation and emission processes into two energy exchange pathways mediated by the different plasmon modes, offering a higher degree of freedom for the manipulation of light-matter interaction. Our system, consisting of high-aspect-ratio Ag nanorods and Si substrates, can support a series of bright and dark plasmon modes with distinct near- and far-field properties and generate relatively intensive local field enhancement in the gap region. As a proof-of-principle, we take plasmon-enhanced fluorescence of dye molecules as an example to reveal the energy exchange mechanism in the dual-channel plasmonic system. Such a system is potentially also useful for manipulating other types of light-matter interaction. Our work represents a step toward the utilization of a broader class of plasmon resonance for the development of optical antennas and various on-chip nanophotonic components.
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Affiliation(s)
- Xiaolu Zhuo
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), 20014 Donostia-San Sebastián, Spain
| | - Shasha Li
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
| | - Nannan Li
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
| | - Xizhe Cheng
- 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.
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7
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Imaeda K, Hasegawa S, Imura K. Observation of the plasmon mode transition from triangular to hexagonal nanoplates. J Chem Phys 2022; 156:044702. [DOI: 10.1063/5.0078371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Keisuke Imaeda
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, Hokkaido 060-0810, Japan
| | - Seiju Hasegawa
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, Shinjuku, Tokyo 169-8555, Japan
| | - Kohei Imura
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, Shinjuku, Tokyo 169-8555, Japan
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8
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Zare EN, Iftekhar S, Park Y, Joseph J, Srivastava V, Khan MA, Makvandi P, Sillanpaa M, Varma RS. An overview on non-spherical semiconductors for heterogeneous photocatalytic degradation of organic water contaminants. CHEMOSPHERE 2021; 280:130907. [PMID: 34162104 DOI: 10.1016/j.chemosphere.2021.130907] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 05/01/2021] [Accepted: 05/12/2021] [Indexed: 06/13/2023]
Abstract
Because of their carcinogenicity and mutagenicity, the elimination of organic contaminants from surface and subsurface water is a subject of environmental significance. Conventional water decontamination approaches such as membrane separation, ultrafiltration, adsorption, reverse osmosis, coagulation, etc., have relatively higher operating costs and can generate highly toxic secondary contaminants. On the other hand, heterogeneous photocatalysis, an advanced oxidation process (AOP), is considered a clean and cost-effective process for organic pollutants degradation. Owing to their distinctive structure and physicochemical properties non-spherical semiconductors have gained considerable limelight in the photocatalytic degradation of organic contaminants. The current review briefly introduces a wide range of organic water contaminants. Recent advances in non-spherical semiconductor assembly and their photocatalytic degradation applications are highlighted. The underlying mechanism, fundamentals of photocatalytic reactions, and the factors affecting the degradation performance are also alluded including the current challenges and future research perspectives.
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Affiliation(s)
| | - Sidra Iftekhar
- Department of Applied Physics, University of Eastern Finland, Kuopio, 70210, Finland
| | - Yuri Park
- Department of Separation Science, Lappeenranta-Lahti University of Technology LUT, Sammonkatu 12, FI, 50130, Mikkeli, Finland
| | - Jessy Joseph
- Department of Separation Science, Lappeenranta-Lahti University of Technology LUT, Sammonkatu 12, FI, 50130, Mikkeli, Finland
| | - Varsha Srivastava
- Department of Separation Science, Lappeenranta-Lahti University of Technology LUT, Sammonkatu 12, FI, 50130, Mikkeli, Finland
| | - Moonis Ali Khan
- Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Pooyan Makvandi
- Center for Materials Interfaces, Istituto Italiano di Tecnologia (IIT), Viale R. Piaggio 34, 56025, Pontedera, Pisa, Italy
| | - Mika Sillanpaa
- Environmental Engineering and Management Research Group, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
| | - Rajender S Varma
- Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University in Olomouc, Šlechtitelů 27, 783 71, Olomouc, Czech Republic.
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9
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Keerthana L, Ahmad Dar M, Dharmalingam G. Plasmonic Au-Metal Oxide Nanocomposites for High-Temperature and Harsh Environment Sensing Applications. Chem Asian J 2021; 16:3558-3584. [PMID: 34510778 DOI: 10.1002/asia.202100885] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/09/2021] [Indexed: 12/13/2022]
Abstract
Noble metal nanoparticles like Au have long been admired for their brilliant colour, significantly influenced by plasmon resonance. When embedded in metal oxides, they exhibit unique properties which make them an excellent choice for sensing in high-temperature and harsh environment atmospheres. In this review, the various morphologies of Au nanoparticles (AuNPs) used in combination with metal oxides for sensing gases at temperatures greater than 300 °C are discussed. Theoretical discussions on the plasmon resonance properties of AuNPs as well as computational techniques like finite difference time domain (FDTD), are often used for understanding and correlating their extinction spectra and are briefed initially. The sensing properties of AuNPs embedded on a metal oxide matrix (such as TiO2 , SiO2 , NiO etc) for quantifying multiple analytes are then elucidated. The effect of high temperature as well as gas environments including corrosive atmospheres on such nanocomposites, and the different approaches to comprehend them are presented. Finally, techniques and methods to improve on the challenges associated with the realization and integration such Au-metal oxide plasmonic nanostructures for applications such as combustion monitoring, fuel cells, and other applications are discussed.
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Affiliation(s)
- L Keerthana
- Plasmonic nanomaterials laboratory, PSG Institute of Advanced Studies, Coimbatore, 641004, India
| | - Mushtaq Ahmad Dar
- Center of Excellence for Research in Engineering (CEREM), College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia
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10
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Pang H, Huang H, Zhou L, Mao Y, Deng F, Lan S. Strong Dipole-Quadrupole-Exciton Coupling Realized in a Gold Nanorod Dimer Placed on a Two-Dimensional Material. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1619. [PMID: 34203113 PMCID: PMC8235324 DOI: 10.3390/nano11061619] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 06/16/2021] [Accepted: 06/18/2021] [Indexed: 11/29/2022]
Abstract
Simple systems in which strong coupling of different excitations can be easily realized are highly important, not only for fundamental research but also for practical applications. Here, we proposed a T-shaped gold nanorod (GNR) dimer composed of a long GNR and a short GNR perpendicular to each other and revealed that the dark quadrupole mode of the long GNR can be activated by utilizing the dipole mode excited in the short GNR. It was found that the strong coupling between the dipole and quadrupole modes can be achieved by exciting the T-shaped GNR dimer with a plane wave. Then, we demonstrated the realization of strong dipole-quadrupole-exciton coupling by placing a T-shaped GNR on a tungsten disulfide (WS2) monolayer, which leads to a Rabi splitting as large as ~299 meV. It was confirmed that the simulation results can be well fitted by using a Hamiltonian based on the coupled harmonic oscillator model and the coupling strengths for dipole-quadrupole, dipole-exciton and quadrupole-exciton can be extracted from the fitting results. Our findings open new horizons for realizing strong plasmon-exciton coupling in simple systems and pave the way for constructing novel plasmonic devices for practical applications.
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Affiliation(s)
- Huajian Pang
- 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; (H.P.); (H.H.); (L.Z.); (Y.M.)
| | - Hongxin 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; (H.P.); (H.H.); (L.Z.); (Y.M.)
| | - Lidan Zhou
- 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; (H.P.); (H.H.); (L.Z.); (Y.M.)
| | - Yuheng Mao
- 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; (H.P.); (H.H.); (L.Z.); (Y.M.)
| | - Fu Deng
- Department of Physics, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China
| | - Sheng Lan
- 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; (H.P.); (H.H.); (L.Z.); (Y.M.)
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11
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Li Y, Sun Q, Zu S, Shi X, Liu Y, Hu X, Ueno K, Gong Q, Misawa H. Correlation between Near-Field Enhancement and Dephasing Time in Plasmonic Dimers. PHYSICAL REVIEW LETTERS 2020; 124:163901. [PMID: 32383952 DOI: 10.1103/physrevlett.124.163901] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 03/26/2020] [Indexed: 06/11/2023]
Abstract
Near-field enhancement and dephasing time play critical roles in several applications of localized surface plasmon resonance. Here, using an example gold dimer system, we reveal the correlation between the near-field enhancement and dephasing time via time-resolved photoemission electron microscopy. Compared with isolated particles, dimers with small gap sizes show stronger near-field enhancement and shorter dephasing times. These results are well reproduced by numerical simulations and further explained by a coupled dipole approximation model. The roles of near- and far-field coupling and plasmon localization in balancing near-field enhancement and dephasing time are also unveiled.
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Affiliation(s)
- Yaolong Li
- State Key Laboratory for Mesoscopic Physics, Frontiers Science Center for Nano-optoelectronics, and Collaborative Innovation Center of Quantum Matter, Department of Physics, Peking University, Beijing 100871, China
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Quan Sun
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan
- College of Electronic Science & Engineering, Jilin University, Changchun 130012, China
| | - Shuai Zu
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Xu Shi
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Yunquan Liu
- State Key Laboratory for Mesoscopic Physics, Frontiers Science Center for Nano-optoelectronics, and Collaborative Innovation Center of Quantum Matter, Department of Physics, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Xiaoyong Hu
- State Key Laboratory for Mesoscopic Physics, Frontiers Science Center for Nano-optoelectronics, and Collaborative Innovation Center of Quantum Matter, Department of Physics, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Kosei Ueno
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan
| | - Qihuang Gong
- State Key Laboratory for Mesoscopic Physics, Frontiers Science Center for Nano-optoelectronics, and Collaborative Innovation Center of Quantum Matter, Department of Physics, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Hiroaki Misawa
- Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0021, Japan
- Center for Emergent Functional Matter Science, National Chiao Tung University, Hsinchu 30010, Taiwan
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12
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Xu Y, Qin Y, Ji B, Song X, Lin J. Polarization manipulated femtosecond localized surface plasmon dephasing time in an individual bowtie structure. OPTICS EXPRESS 2020; 28:9310-9319. [PMID: 32225540 DOI: 10.1364/oe.379429] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 02/23/2020] [Indexed: 06/10/2023]
Abstract
The performance of plasmon in applications is strongly related to plasmon damping, i.e., a dephasing of the optical polarization associated with the electron oscillation. Accurate measurement, manipulation, and, ultimately, prolongation of the dephasing time are prerequisites to the future development of the application of plasmonics. Here, we studied the dephasing time of different plasmonic hotspots in an individual bowtie structure by time-resolved photoemission electron microscopy and proposed an easy-to-operate method for actively and flexibly controlling the mode-dependent plasmon dephasing time by varying the polarization direction of a femtosecond laser. Experimentally, we achieved a large adjustment of the dephasing time ranging from 7 to 17 fs. In addition, a structural defect was found to drastically extend the plasmon dephasing time. Assisted with the finite-difference time-domain simulation, the underlying physics of the dephasing time extension by the structural defect was given.
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13
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Zhao C, Xu X, Ferhan AR, Chiang N, Jackman JA, Yang Q, Liu W, Andrews AM, Cho NJ, Weiss PS. Scalable Fabrication of Quasi-One-Dimensional Gold Nanoribbons for Plasmonic Sensing. NANO LETTERS 2020; 20:1747-1754. [PMID: 32027140 PMCID: PMC7067626 DOI: 10.1021/acs.nanolett.9b04963] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Plasmonic nanostructures have a wide range of applications, including chemical and biological sensing. However, the development of techniques to fabricate submicrometer-sized plasmonic structures over large scales remains challenging. We demonstrate a high-throughput, cost-effective approach to fabricate Au nanoribbons via chemical lift-off lithography (CLL). Commercial HD-DVDs were used as large-area templates for CLL. Transparent glass slides were coated with Au/Ti films and functionalized with self-assembled alkanethiolate monolayers. Monolayers were patterned with lines via CLL. The lifted-off, exposed regions of underlying Au were selectively etched into large-area grating-like patterns (200 nm line width; 400 nm pitch; 60 nm height). After removal of the remaining monolayers, a thin In2O3 layer was deposited and the resulting gratings were used as plasmonic sensors. Distinct features in the extinction spectra varied in their responses to refractive index changes in the solution environment with a maximum bulk sensitivity of ∼510 nm/refractive index unit. Sensitivity to local refractive index changes in the near-field was also achieved, as evidenced by real-time tracking of lipid vesicle or protein adsorption. These findings show how CLL provides a simple and economical means to pattern large-area plasmonic nanostructures for applications in optoelectronics and sensing.
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Affiliation(s)
- Chuanzhen Zhao
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Xiaobin Xu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
- Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, & Institute for Advanced Study, Tongji University, Shanghai 201804, China
| | - Abdul Rahim Ferhan
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Naihao Chiang
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Joshua A. Jackman
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- SKKU-UCLA-NTU Precision Biology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Qing Yang
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Wenfei Liu
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Anne M. Andrews
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior, and Hatos Center for Neuropharmacology, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Nam-Joon Cho
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore
- SKKU-UCLA-NTU Precision Biology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459 Singapore
| | - Paul S. Weiss
- Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, California 90095, United States
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California 90095, United States
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14
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Li L, Liang Y, Zong X, Liu Y. Self-assembly plasmonic metamaterials based on templated annealing for advanced biosensing. OPTICS EXPRESS 2020; 28:695-704. [PMID: 32118992 DOI: 10.1364/oe.382128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 12/22/2019] [Indexed: 06/10/2023]
Abstract
In this paper, we introduce a novel method for the fabrication of self-assembly plasmonic metamaterials by exploiting fluid instabilities of optical thin films. Due to interplay between template reflow and spinodal dewetting, two metal nanoparticles of different sizes are generated on the top mesas of free-standing porous anodic aluminum oxide (AAO) template, which results in the apprearance of double resonant peaks in the extinction spectrum. These two resonant peaks possess refractive index resolution 3.27 × 10-4 and 2.53 × 10-4 RIU, respectively. This optical intensity modulation based plasmonic nanoplatform shows a dramatically surface sensing performance with outstanding detection capacity of biomolecules, because of the very small decay length of electric field at dual-modes. The detection ability for concanavalin A (Con A) demonstrats that the limit of detection of dual-modes reaches as small as 68 and 79 nM, respectively.
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15
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Dark Plasmon with a High Figure of Merit in a Single Au Triangular Nano Frame. J CLUST SCI 2019. [DOI: 10.1007/s10876-019-01608-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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16
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Wang J, Yang L, Wang F, Liu C, Xu C, Liu Q, Liu W, Li X, Sun T, Chu PK. Fano resonances in symmetric plasmonic split-ring/ring dimer nanostructures. APPLIED OPTICS 2019; 58:8069-8074. [PMID: 31674362 DOI: 10.1364/ao.58.008069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 09/13/2019] [Indexed: 06/10/2023]
Abstract
The optical properties of symmetric split-ring/ring dimer (SRRD) nanostructures composed of a small nanoring surrounded by an Ag splitting nanoring with a larger diameter are calculated theoretically. The apparent asymmetric Fano line shape in the spectra is related to fast switching of the bonding modes between the split-ring plasmon and ring dipole. The influence of the dimensions of the SRRD nanostructures on the spectral positions and intensity of Fano resonance is studied, and the asymmetric Fano line shape can be flexibly adjusted by varying the geometric parameters. In addition, relatively simple SRRD nanostructures have the same overall sensing figures of merit as conventional nanoparticles, thus rendering them suitable for high-performance optical sensors.
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17
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Shang W, Xiao F, Zhu W, Han L, Mei T, Zhao J. Characterizing localized surface plasmon resonances using focused radially polarized beam. APPLIED OPTICS 2019; 58:5812-5816. [PMID: 31503889 DOI: 10.1364/ao.58.005812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Accepted: 06/28/2019] [Indexed: 06/10/2023]
Abstract
We demonstrate a scheme to characterize the localized surface plasmon resonances (LSPRs) of an individual metallic nanorod by employing a focused radially polarized beam (RPB) illumination under normal incidence. The focused RPB has a unique three-dimensional electric field polarization distribution in the focal plane, which can effectively and selectively excite the dipole and multipole plasmon resonances in a metallic nanorod by just moving the nanorod within the focal plane. This performance can be attributed to the mode matching between the excitation electric field of the incident RPB and the LSPRs in a metallic nanorod. Emphatically, in contrast to the commonly used oblique incidence illumination with the linearly polarized light, our proposed scheme is based on the normally incident light illumination and compatible with conventional optical microscopy, which is more scalable for spectroscopic characterization of individual nanostructures.
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18
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Zheng J, Yang W, Wang J, Zhu J, Qian L, Yang Z. An ultranarrow SPR linewidth in the UV region for plasmonic sensing. NANOSCALE 2019; 11:4061-4066. [PMID: 30776034 DOI: 10.1039/c8nr09703h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Conventional surface plasmon resonance (SPR) modes based on gold and silver nanostructures only operate in the visible and near-infrared (NIR) regions. Nowadays, with the rapid development of strong coupling between molecules and plasmonic nanostructures and surface enhanced spectroscopy, it is highly desired to modulate the SPR modes with a narrow linewidth toward the ultraviolet (UV) wavelength region through a low cost and reproducible fabrication method. Herein, laser interference lithography is utilized to manufacture stable Al plasmonic arrays with well-controlled and tunable geometries. Importantly, an ultranarrow linewidth of SPR modes as narrow as 14 nm has been successfully obtained in the near UV region. The fabricated Al plasmonic arrays show a high sensitivity toward 485 nm RIU-1 when it is used as a refractive index sensor. The results reported here make a valuable extension of plasmonic resonant modes spanning visible and NIR into the UV region, and it may provide a robust way to achieve alternative plasmonic materials for plasmon-enhanced molecular sensing, plasmonic nanolasers, non-linear optics, strong coupling and surface enhanced spectroscopy in the UV regions.
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Affiliation(s)
- Jie Zheng
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Jiujiang Research Institute, Xiamen University, Xiamen, Fujian 361005, P. R. China.
| | - Weimin Yang
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Jiujiang Research Institute, Xiamen University, Xiamen, Fujian 361005, P. R. China.
| | - Jingyu Wang
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Jiujiang Research Institute, Xiamen University, Xiamen, Fujian 361005, P. R. China.
| | - Jinfeng Zhu
- Department of Electronic Science, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Lihua Qian
- School of Physics, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
| | - Zhilin Yang
- Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Jiujiang Research Institute, Xiamen University, Xiamen, Fujian 361005, P. R. China.
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19
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Matsuura T, Imaeda K, Hasegawa S, Suzuki H, Imura K. Characterization of Overlapped Plasmon Modes in a Gold Hexagonal Plate Revealed by Three-Dimensional Near-Field Optical Microscopy. J Phys Chem Lett 2019; 10:819-824. [PMID: 30735394 DOI: 10.1021/acs.jpclett.8b03578] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
A detailed characterization of plasmon modes is important not only for a deeper understanding of plasmons but also for their practical applications. In this study, we investigated the three-dimensional near-field characteristics of high-order plasmon modes excited in a gold hexagonal nanoplate. From the near-field spectroscopic images, we found that both in-plane and out-of-plane plasmon modes observed near 900 nm were spectrally and spatially overlapped. We performed three-dimensional near-field measurement to reveal the optical characteristics of the overlapped modes in detail. We found that the steric near-field distribution near the nanoplate strongly depended on the plasmon mode, and the out-of-plane mode confines electromagnetic fields more tightly than the in-plane mode. We also found that the in-plane mode was dominantly visualized as the probe tip-sample distance increased. These findings demonstrate that the three-dimensional near-field technique enables selective visualization of a single plasmon mode even if multiple modes are spatially and spectrally overlapped.
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Affiliation(s)
- Takuya Matsuura
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering , Waseda University , Shinjuku , Tokyo 169-8555 , Japan
| | - Keisuke Imaeda
- Research Institute for Science and Engineering , Waseda University , Shinjuku , Tokyo 169-8555 , Japan
| | - Seiju Hasegawa
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering , Waseda University , Shinjuku , Tokyo 169-8555 , Japan
| | - Hiromasa Suzuki
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering , Waseda University , Shinjuku , Tokyo 169-8555 , Japan
| | - Kohei Imura
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering , Waseda University , Shinjuku , Tokyo 169-8555 , Japan
- Research Institute for Science and Engineering , Waseda University , Shinjuku , Tokyo 169-8555 , Japan
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20
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Zhuo X, Yip HK, Cui X, Wang J, Lin HQ. Colour routing with single silver nanorods. LIGHT, SCIENCE & APPLICATIONS 2019; 8:39. [PMID: 31016015 PMCID: PMC6467987 DOI: 10.1038/s41377-019-0150-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 03/21/2019] [Accepted: 03/27/2019] [Indexed: 05/11/2023]
Abstract
Elongated plasmonic nanoparticles have been extensively explored over the past two decades. However, in comparison with the dipolar plasmon mode that has attracted the most interest, much less attention has been paid to multipolar plasmon modes because they are usually thought to be "dark modes", which are unable to interact with far-field light efficiently. Herein, we report on an intriguing far-field scattering phenomenon, colour routing, based on longitudinal multipolar plasmon modes supported by high-aspect-ratio single Ag nanorods. Taking advantage of the distinct far-field behaviours of the odd and even multipolar plasmon modes, we demonstrate two types of colour routing, where the incident white light can be scattered into several beams with different colours as well as different propagation directions. Because of the narrow linewidths of the longitudinal multipolar plasmon modes, there is little spectral overlap between the adjacent peaks, giving rise to outstanding colour selectivity. Our experimental results and theoretical model provide a simple yet effective picture for understanding the far-field behaviour of the longitudinal multipolar plasmon modes and the resultant colour routing phenomenon. Moreover, the outstanding colour routing capability of the high-aspect-ratio Ag nanorods enables nanoscale optical components with simple geometries for controlling the propagation of light below the diffraction limit of light.
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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
| | - Ximin Cui
- 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
| | - Hai-Qing Lin
- Beijing Computational Science Research Center, Beijing, 100193 China
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21
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Deng Q, Kang M, Zheng D, Zhang S, Xu H. Mimicking plasmonic nanolaser emission by selective extraction of electromagnetic near-field from photonic microcavity. NANOSCALE 2018; 10:7431-7439. [PMID: 29637981 DOI: 10.1039/c8nr00102b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Plasmonic nanolasers have attracted significant attention owing to their ability to generate a coherent optical field in the deep subwavelength region, and they exhibit promising applications in integrated photonics, bioimaging and sensing. However, the demonstration of lasing in individual metallic nanoparticles with 3D subwavelength confinement represents a significant challenge and is yet to be realized. Herein, we propose to mimic a plasmonic nanolaser via selective scattering off the evanescent tail of a lasing photonic nanobelt using a single silver nanorod (24 nm × 223 nm). The nanorod acts as an optical antenna that selectively extracts the near-field component along the rod axis. The light output from the silver nanorod mimics the emission of a plasmonic nanolaser in its localized near-field and polarization dependence, except for the lasing wavelength and linewidth, which are inherited from the photonic laser. The realization of localized coherent light sources provides promising nanoscale lighting that shows potential in background-suppressed illumination, biosensing and imaging.
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Affiliation(s)
- Qian Deng
- School of Physics and Technology, Center for Nanoscience and Nanotechnology, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, China.
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22
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Wei H, Pan D, Zhang S, Li Z, Li Q, Liu N, Wang W, Xu H. Plasmon Waveguiding in Nanowires. Chem Rev 2018; 118:2882-2926. [DOI: 10.1021/acs.chemrev.7b00441] [Citation(s) in RCA: 142] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Hong Wei
- Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Deng Pan
- School of Physics and Technology, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, 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
| | - Zhipeng Li
- Beijing Key Laboratory of Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University, Beijing 100048, 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
| | - Ning Liu
- Department of Physics and Bernal Institute, University of Limerick, Limerick, Ireland
| | - Wenhui Wang
- School of Science, Xi’an Jiaotong University, Xi’an 710049, 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
- Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
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23
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Hajebifard A, Berini P. Fano resonances in plasmonic heptamer nano-hole arrays. OPTICS EXPRESS 2017; 25:18566-18580. [PMID: 29041055 DOI: 10.1364/oe.25.018566] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 05/30/2017] [Indexed: 06/07/2023]
Abstract
The optical properties of gold heptamer nanohole arrays have been investigated theoretically and numerically. This structure support pronounced Fano resonances with high transmittance (~50%) and narrow bandwidths (down to 12 nm). The Fano features arise from the interference between light directly transmitted through the holes, and light indirectly scattered through the excitation of localized surface plasmon polaritons (LSPPs), propagating surface plasmon polaritons (SPPs), or/and waves related to Wood's anomaly (WA). The mechanisms behind the generation of these resonances are revealed by observing near-field distributions, altering the structural parameters and applying the Bloch wave model. Furthermore, it is shown that Fano resonances associated with LSPPs exhibit high surface (2 nm/nm) and bulk sensitivities (400 nm/RIU). However, the highest figure of merit (~24 RIU-1) occurs for a Fano resonance involving a WA and SPP mode.
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24
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Metamaterials and Metasurfaces for Sensor Applications. SENSORS 2017; 17:s17081726. [PMID: 28749422 PMCID: PMC5579738 DOI: 10.3390/s17081726] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 07/21/2017] [Accepted: 07/23/2017] [Indexed: 01/19/2023]
Abstract
Electromagnetic metamaterials (MMs) and metasurfaces (MSs) are artificial media and surfaces with subwavelength separations of meta-atoms designed for anomalous manipulations of light properties. Owing to large scattering cross-sections of metallic/dielectric meta-atoms, it is possible to not only localize strong electromagnetic fields in deep subwavelength volume but also decompose and analyze incident light signal with ultracompact setup using MMs and MSs. Hence, by probing resonant spectral responses from extremely boosted interactions between analyte layer and optical MMs or MSs, sensing the variation of refractive index has been a popular and practical application in the field of photonics. Moreover, decomposing and analyzing incident light signal can be easily achieved with anisotropic MSs, which can scatter light to different directions according to its polarization or wavelength. In this paper, we present recent advances and potential applications of optical MMs and MSs for refractive index sensing and sensing light properties, which can be easily integrated with various electronic devices. The characteristics and performances of devices are summarized and compared qualitatively with suggestions of design guidelines.
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25
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Zheng D, Zhang S, Deng Q, Kang M, Nordlander P, Xu H. Manipulating Coherent Plasmon-Exciton Interaction in a Single Silver Nanorod on Monolayer WSe 2. NANO LETTERS 2017; 17:3809-3814. [PMID: 28530102 DOI: 10.1021/acs.nanolett.7b01176] [Citation(s) in RCA: 112] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Strong coupling between plasmons and excitons in nanocavities can result in the formation of hybrid plexcitonic states. Understanding the dispersion relation of plexcitons is important both for fundamental quantum science and for applications including optoelectronics and nonlinear optics devices. The conventional approach, based on statistics over different nanocavities, suffers from large inhomogeneities from the samples, owing to the nonuniformity of nanocavities and the lack of control over the locations and orientations of the excitons. Here we report the first measurement of the dispersion relationship of plexcitons in an individual nanocavity. Using a single silver nanorod as a Fabry-Pérot nanocavity, we realize strong coupling of plasmon in single nanocavity with excitons in a single atomic layer of tungsten diselenide. The plexciton dispersion is measured by in situ redshifting the plasmon energy via successive deposition of a dielectric layer. Room-temperature formation of plexcitons with Rabi splittings as large as 49.5 meV is observed. The realization of strong plasmon-exciton coupling by in situ tuning of the plasmon provides a novel route for the manipulation of excitons in semiconductors.
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Affiliation(s)
| | | | | | | | - Peter Nordlander
- Department of Physics and Astronomy, Department of Electrical and Computer Engineering and Laboratory for Nanophotonics, Rice University , Houston, Texas 77005, United States
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26
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Tunable angle-independent refractive index sensor based on Fano resonance in integrated metal and graphene nanoribbons. Sci Rep 2016; 6:29984. [PMID: 27439964 PMCID: PMC4954990 DOI: 10.1038/srep29984] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Accepted: 06/24/2016] [Indexed: 11/09/2022] Open
Abstract
We propose a novel mechanism to construct a tunable and ultracompact refractive index sensor by using the Fano resonance in metal-graphene hybrid nanostructure. Plasmon modes in graphene nanoribbons and waveguide resonance modes in the slits of metal strip array coexist in this system. Strong interference between the two different modes occurs when they are spectrally overlapped, resulting in a Fano-type asymmetrically spectral lineshape which can be used for detecting the variations of ambient refractive index. The proposed sensor has a relatively high figure of merit (FOM) over 20 and its sensing performance shows a good tolerance to roughness. In addition to the wide range measurement enabled by the electrical tuning of graphene plasmon modes, such ultracompact system also provides an angle-independent operation and therefore, it can efficiently work for the detection of gas, liquid, or solids. Such optical nanostructure may also be applied to diverse fields such as temperature/pressure metering, medical detection, and mechanical precision measurement.
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27
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Zhang S, Xu H. Tunable dark plasmons in a metallic nanocube dimer: toward ultimate sensitivity nanoplasmonic sensors. NANOSCALE 2016; 8:13722-9. [PMID: 27412788 DOI: 10.1039/c6nr03806a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Metallic nanoparticles can function as label-free nanosensors monitoring the local dielectric environment in their close vicinity, thanks to the localized surface plasmon resonances. The sensing figure of merit is limited by the total loss rate of the plasmon. Here, we theoretically study a silver nanocube dimer and discover for the first time a dark plasmon with its total loss rate at the lower theoretical limit. It originates from the attractive coupling of the dipolar and quadrupolar mode in the individual nanocubes. It shows an unprecedented sensitivity to the interparticle gap distance, i.e., one ångström change in the gap distance results in a shift twice as large as the peak width. The sensing figure of merit using this dark plasmon is 56-61, reaching the ultimate value limited only by the material permittivity. The field of the mode is confined mainly within the gap region which is in the extreme deep subwavelength (3.5 × 10(-6)λ0(3)) region. Besides sensing applications, the dark plasmon also shows foreseeable potential in enhanced spectroscopy, nanolasers and other nanophotonic devices.
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Affiliation(s)
- Shunping Zhang
- School of Physics and Technology, Center for Nanoscience and Nanotechnology, MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, China.
| | - Hongxing Xu
- School of Physics and Technology, Center for Nanoscience and Nanotechnology, MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, China. and The Institute for Advanced Studies, Wuhan University, Wuhan 430072, China and Division of Solid State Physics/The Nanometer Structure Consortium, Lund University, Box 118, S-22100, Lund, Sweden
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28
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Colliex C, Kociak M, Stéphan O. Electron Energy Loss Spectroscopy imaging of surface plasmons at the nanometer scale. Ultramicroscopy 2016; 162:A1-A24. [DOI: 10.1016/j.ultramic.2015.11.012] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 11/19/2015] [Accepted: 11/28/2015] [Indexed: 10/22/2022]
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29
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Deng HD, Chen XY, Xu Y, Miroshnichenko AE. Single protein sensing with asymmetric plasmonic hexamer via Fano resonance enhanced two-photon luminescence. NANOSCALE 2015; 7:20405-20413. [PMID: 26451715 DOI: 10.1039/c5nr04118j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Fano resonances in plasmonic systems have been proved to facilitate various sensing applications in the nanoscale. In this work, we propose an experimental scheme to realize a single protein sensing by utilizing its two-photon luminescence enhanced by a plasmonic Fano resonance system. The asymmetric gold hexamer supporting polarization-dependent Fano resonances and plasmonic modes without in-plane rotational symmetry is used as a referenced spatial coordinate for bio-sensing. We demonstrate via the full-vectorial three-dimensional simulation that the moving direction and the spatial location of a protein can be detected via its two-photon luminescence, which benefits from the resonant near-field interaction with the electromagnetic hot-spots. The sensitivity to changes in position of our method is substantially better compared with the conventional linear sensing approach. Our strategy would facilitate the sensing, tracking and imaging of a single biomolecule in deep sub-wavelength scale and with a small optical extinction cross-section.
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Affiliation(s)
- Hai-Dong Deng
- College of Electronic Engineering, South China Agricultural University, Guangzhou, 510642, P.R. China
| | - Xing-Yu Chen
- College of Electronic Engineering, South China Agricultural University, Guangzhou, 510642, P.R. China
| | - Yi Xu
- Department of Electronic Engineering, College of Information Science and Technology, Jinan University, Guangzhou 510632, P.R. China.
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30
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Nishiyama Y, Imura K, Okamoto H. Observation of Plasmon Wave Packet Motions via Femtosecond Time-Resolved Near-Field Imaging Techniques. NANO LETTERS 2015; 15:7657-65. [PMID: 26479085 DOI: 10.1021/acs.nanolett.5b03610] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The generation and dynamics of plasmon wave packets in single gold nanorods were observed at a spatiotemporal scale of 100 nm and 10 fs via time-resolved near-field optical microscopy. Following simultaneous excitation of two plasmon modes of a nanorod with an ultrashort near-field pulse, a decay and revival feature of the time-resolved signal was obtained, which reflected the reciprocating motion of the wave packet. The time-resolved near-field images were also indicative of the wave packet motion. At some period of time after the excitation, the spatial features of the two modes appeared alternately, showing motion of plasmonic wave crests along the rod. The wave packet propagation was clearly demonstrated from this observation with the aid of a simulation model. The present experimental scheme opens the door to coherent control of plasmon-induced optical fields in a nanometer spatial scale and femtosecond temporal scale.
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Affiliation(s)
- Yoshio Nishiyama
- Institute for Molecular Science , Myodaiji, 38 Nishigonaka, Okazaki, Aichi 444-8585, Japan
| | - Kohei Imura
- School of Advanced Science and Engineering, Waseda University , Okubo, Shinjuku, Tokyo 169-8555, Japan
| | - Hiromi Okamoto
- Institute for Molecular Science , Myodaiji, 38 Nishigonaka, Okazaki, Aichi 444-8585, Japan
- The Graduate University for Advanced Studies , Myodaiji, 38 Nishigonaka, Okazaki, Aichi 444-8585, Japan
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31
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Mårsell E, Losquin A, Svärd R, Miranda M, Guo C, Harth A, Lorek E, Mauritsson J, Arnold CL, Xu H, L’Huillier A, Mikkelsen A. Nanoscale Imaging of Local Few-Femtosecond Near-Field Dynamics within a Single Plasmonic Nanoantenna. NANO LETTERS 2015; 15:6601-8. [PMID: 26375959 PMCID: PMC4621049 DOI: 10.1021/acs.nanolett.5b02363] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 09/11/2015] [Indexed: 05/22/2023]
Abstract
The local enhancement of few-cycle laser pulses by plasmonic nanostructures opens up for spatiotemporal control of optical interactions on a nanometer and few-femtosecond scale. However, spatially resolved characterization of few-cycle plasmon dynamics poses a major challenge due to the extreme length and time scales involved. In this Letter, we experimentally demonstrate local variations in the dynamics during the few strongest cycles of plasmon-enhanced fields within individual rice-shaped silver nanoparticles. This was done using 5.5 fs laser pulses in an interferometric time-resolved photoemission electron microscopy setup. The experiments are supported by finite-difference time-domain simulations of similar silver structures. The observed differences in the field dynamics across a single particle do not reflect differences in plasmon resonance frequency or dephasing time. They instead arise from a combination of retardation effects and the coherent superposition between multiple plasmon modes of the particle, inherent to a few-cycle pulse excitation. The ability to detect and predict local variations in the few-femtosecond time evolution of multimode coherent plasmon excitations in rationally synthesized nanoparticles can be used in the tailoring of nanostructures for ultrafast and nonlinear plasmonics.
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Affiliation(s)
- Erik Mårsell
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Arthur Losquin
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Robin Svärd
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Miguel Miranda
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Chen Guo
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Anne Harth
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Eleonora Lorek
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Johan Mauritsson
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Cord L. Arnold
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Hongxing Xu
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
- School of Physics and Technology, and Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
| | - Anne L’Huillier
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
| | - Anders Mikkelsen
- Department of Physics, Lund University, P.O. Box 118, 221 00 Lund, Sweden
- E-mail:
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32
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Mayer M, Scarabelli L, March K, Altantzis T, Tebbe M, Kociak M, Bals S, García
de Abajo FJ, Fery A, Liz-Marzán LM. Controlled Living Nanowire Growth: Precise Control over the Morphology and Optical Properties of AgAuAg Bimetallic Nanowires. NANO LETTERS 2015; 15:5427-37. [PMID: 26134470 PMCID: PMC4538453 DOI: 10.1021/acs.nanolett.5b01833] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Inspired by the concept of living polymerization reaction, we are able to produce silver-gold-silver nanowires with a precise control over their total length and plasmonic properties by establishing a constant silver deposition rate on the tips of penta-twinned gold nanorods used as seed cores. Consequently, the length of the wires increases linearly in time. Starting with ∼210 nm × 32 nm gold cores, we produce nanowire lengths up to several microns in a highly controlled manner, with a small self-limited increase in thickness of ∼4 nm, corresponding to aspect ratios above 100, whereas the low polydispersity of the product allows us to detect up to nine distinguishable plasmonic resonances in a single colloidal solution. We analyze the spatial distribution and the nature of the plasmons by electron energy loss spectroscopy and obtain excellent agreement between measurements and electromagnetic simulations, clearly demonstrating that the presence of the gold core plays a marginal role, except for relatively short wires or high-energy modes.
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Affiliation(s)
- Martin Mayer
- Physical Chemistry II, University
of Bayreuth, Universitätsstraße
30, 95440 Bayreuth, Germany
| | | | - Katia March
- Laboratoire de Physique des Solides CNRS/UMR8502, University Paris-Sud, Bâtiment 510, Orsay 91405, France
| | - Thomas Altantzis
- EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Moritz Tebbe
- Physical Chemistry II, University
of Bayreuth, Universitätsstraße
30, 95440 Bayreuth, Germany
| | - Mathieu Kociak
- Laboratoire de Physique des Solides CNRS/UMR8502, University Paris-Sud, Bâtiment 510, Orsay 91405, France
| | - Sara Bals
- EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - F. Javier García
de Abajo
- ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain
- ICREA-Institució Catalana de Recerca i Estudis
Avançats, Passeig
Lluís Companys, 23, 08010 Barcelona, Spain
| | - Andreas Fery
- Physical Chemistry II, University
of Bayreuth, Universitätsstraße
30, 95440 Bayreuth, Germany
| | - Luis M. Liz-Marzán
- CIC biomaGUNE, Paseo de Miramón 182, 20009 Donostia—San Sebastián, Spain
- Ikerbasque, Basque Foundation
for Science, 48013 Bilbao, Spain
- E-mail:
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33
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Zhuo X, Zhu X, Li Q, Yang Z, Wang J. Gold Nanobipyramid-Directed Growth of Length-Variable Silver Nanorods with Multipolar Plasmon Resonances. ACS NANO 2015; 9:7523-35. [PMID: 26135608 DOI: 10.1021/acsnano.5b02622] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We report on a method for the preparation of uniform and length-variable Ag nanorods through anisotropic Ag overgrowth on high-purity Au nanobipyramids. The rod diameters can be roughly tailored from ∼20 nm to ∼50 nm by judicious selection of differently sized Au nanobipyramids. The rod lengths can be tuned from ∼150 nm to ∼550 nm by varying the Ag precursor amount during the overgrowth process and/or by anisotropic shortening through mild oxidation. The controllable aspect ratios, high purity, and high dimensional uniformity of these Ag nanorods enable the observation of Fabry-Pérot-like multipolar plasmon resonance modes in the colloidal suspensions at the ensemble level, which has so far been demonstrated only on Au nanorods prepared electrochemically with anodic aluminum oxide templates. Depending on the mode order and geometry of the Ag nanorods, the multipolar plasmon wavelengths can be readily tailored over a wide spectral range from the visible to near-infrared region. We have further elucidated the relationships between the multipolar plasmon wavelengths and the geometric dimensions of the Ag nanorods at both the ensemble and single-particle levels. Our results indicate that the Au nanobipyramid-directed, dimensionally controllable Ag nanorods will be an attractive and promising candidate for developing multipolar plasmon-based devices and applications.
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Affiliation(s)
- Xiaolu Zhuo
- †Department of Physics, 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
| | - Qian Li
- †Department of Physics, 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
| | - Jianfang Wang
- †Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
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34
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Zhang S, Gu C, Xu H. Single nanoparticle couplers for plasmonic waveguides. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:4264-4269. [PMID: 25044765 DOI: 10.1002/smll.201400990] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 06/16/2014] [Indexed: 06/03/2023]
Abstract
A single nanoparticle antenna, can be used as an efficient coupler for plasmonic nanowire waveguides. The coup-ling of light into the surface plasmon polaritons on a nanowire can be suppressed or enhanced depending on the surface plasmon resonances of the nanoantenna. The coupler is compacted and can be simply controlled using focus ion beam.
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Affiliation(s)
- Shunping Zhang
- Beijing National Laboratory for Condensed, Matter Physics and Institute of Physics, Chinese Academy of Sciences, Box 603-146, Beijing, 100190, China; Center for Nanoscience and Nanotechnology and School of Physics and Technology, Wuhan University, Wuhan, 430072, China
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35
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Martin J, Kociak M, Mahfoud Z, Proust J, Gérard D, Plain J. High-resolution imaging and spectroscopy of multipolar plasmonic resonances in aluminum nanoantennas. NANO LETTERS 2014; 14:5517-23. [PMID: 25207386 DOI: 10.1021/nl501850m] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We report on the high resolution imaging of multipolar plasmonic resonances in aluminum nanoantennas using electron energy loss spectroscopy (EELS). Plasmonic resonances ranging from near-infrared to ultraviolet (UV) are measured. The spatial distributions of the multipolar resonant modes are mapped and their energy dispersion is retrieved. The losses in the aluminum antennas are studied through the full width at half-maximum of the resonances, unveiling the weight of both interband and radiative damping mechanisms of the different multipolar resonances. In the blue-UV spectral range, high order resonant modes present a quality factor up to 8, two times higher than low order resonant modes at the same energy. This study demonstrates that near-infrared to ultraviolet tunable multipolar plasmonic resonances in aluminum nanoantennas with relatively high quality factors can be engineered. Aluminum nanoantennas are thus an appealing alternative to gold or silver ones in the visible and can be efficiently used for UV plasmonics.
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Affiliation(s)
- Jérôme Martin
- Institut Charles Delaunay - Laboratoire de nanotechnologies et d'instrumentation optique, UMR CNRS 6281, Université de Technologie de Troyes , Troyes 10010, France
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36
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Yang ZJ, Hao ZH, Lin HQ, Wang QQ. Plasmonic Fano resonances in metallic nanorod complexes. NANOSCALE 2014; 6:4985-4997. [PMID: 24733287 DOI: 10.1039/c3nr06502b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Plasmonic Fano resonances (FRs) in nanostructures have been extensively studied in recent years. Nanorod-based complexes for FRs have also attracted much attention. The basic optical properties and fabrication technology of different kinds of plasmonic nanorods have been greatly developed over the last several years. The mutipole plasmon resonances and their flexible adjustment ranges on nanorods make them promising for FR modifications and structure diversity. In this paper, we review some recently studied plasmonic nanorod based nanostructures for FRs, including single nanorods, dimers, mutipole rods and nanorod-nanoparticle hybrids. The corresponding applications of the FRs are also briefly discussed.
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Affiliation(s)
- Zhong-Jian Yang
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China.
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37
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Verellen N, López-Tejeira F, Paniagua-Domínguez R, Vercruysse D, Denkova D, Lagae L, Van Dorpe P, Moshchalkov VV, Sánchez-Gil JA. Mode parity-controlled Fano- and Lorentz-like line shapes arising in plasmonic nanorods. NANO LETTERS 2014; 14:2322-9. [PMID: 24702521 DOI: 10.1021/nl404670x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
We present the experimental observation of spectral lines of distinctly different shapes in the optical extinction cross-section of metallic nanorod antennas under near-normal plane wave illumination. Surface plasmon resonances of odd mode parity present Fano interference in the scattering cross-section, resulting in asymmetric spectral lines. Contrarily, modes with even parity appear as symmetric Lorentzian lines. Finite element simulations are used to verify the experimental results. The emergence of either constructive or destructive mode interference is explained with a semianalytical 1D line current model. This simple model directly explains the mode-parity dependence of the Fano-like interference. Plasmonic nanorods are widely used as half-wave optical dipole antennas. Our findings offer a perspective and theoretical framework for operating these antennas at higher-order modes.
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Affiliation(s)
- Niels Verellen
- INPAC and Department of Physics and Astronomy, KU Leuven , Celestijnenlaan 200 D, B-3001 Leuven, Belgium
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38
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Zhan Y, Lei DY, Li X, Maier SA. Plasmonic Fano resonances in nanohole quadrumers for ultra-sensitive refractive index sensing. NANOSCALE 2014; 6:4705-4715. [PMID: 24658052 DOI: 10.1039/c3nr06024a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Plasmonic Fano resonances arising from electromagnetic interactions in metallic nanostructures exhibit spectral characteristics analogous to those from the electron waves in oligomer molecules. Though a great deal of research interest has been attracted to study the optical properties and explore the associated applications of metallic nanoparticle oligomers, the plasmonic response of their complementary structures--nanohole clusters--remains largely unexplored. Here we show numerically by a full-wave finite element method that a nanohole quadrumer can sustain two Fano resonances when the incident electric field is oriented along the long-axis of the quadrumer system. The underlying physical mechanisms responsible for the Fano resonance formation are revealed explicitly by spectrally deconstructing the Fano lineshape, spatially decomposing the structure configuration and mapping the electric field profile and charge distribution, which collectively demonstrate a strong mode coupling between either two antiparallel dipolar modes or dipole-quadruple modes in the nanohole quadrumer. We further show that the spectral profile of the Fano resonance including the resonance linewidth and spectral contrast can be engineered flexibly by adjusting the geometrical parameters of the nanohole cluster, including the nanohole diameter, film thickness and interhole distance. With an optimized and realistic geometrical configuration, the nanohole quadrumer system exhibits an overall sensing figure of merit up to 14.25, far surpassing the value reported for conventional nanoparticle oligomers.
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Affiliation(s)
- Yaohui Zhan
- Institute of Modern Optical Technologies & Collaborative Innovation Center of Suzhou Nano Science and Technology, Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China, Soochow University, Suzhou 215006, China.
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39
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Tong L, Wei H, Zhang S, Xu H. Recent advances in plasmonic sensors. SENSORS 2014; 14:7959-73. [PMID: 24803189 PMCID: PMC4063061 DOI: 10.3390/s140507959] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 04/16/2014] [Accepted: 04/22/2014] [Indexed: 11/16/2022]
Abstract
Plasmonic sensing has been an important multidisciplinary research field and has been extensively used in detection of trace molecules in chemistry and biology. The sensing techniques are typically based on surface-enhanced spectroscopies and surface plasmon resonances (SPRs). This review article deals with some recent advances in surface-enhanced Raman scattering (SERS) sensors and SPR sensors using either localized surface plasmon resonances (LSPRs) or propagating surface plasmon polaritons (SPPs). The advances discussed herein present some improvements in SERS and SPR sensing, as well as a new type of nanowire-based SPP sensor.
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Affiliation(s)
- Lianming Tong
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
| | - Hong Wei
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
| | - Shunping Zhang
- Center for Nanoscience and Nanotechnology, and School of Physics and Technology, Wuhan University, Wuhan 430072, China.
| | - Hongxing Xu
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
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40
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Li Z, Zhang S, Tong L, Wang P, Dong B, Xu H. Ultrasensitive size-selection of plasmonic nanoparticles by Fano interference optical force. ACS NANO 2014; 8:701-708. [PMID: 24308824 DOI: 10.1021/nn405364u] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this paper, we propose a solution for the ultrasensitive optical selection of plasmonic nanoparticles using Fano interference-induced scattering forces. Under a Gaussian beam excitation, the scattering of a plasmonic nanoparticle at its Fano resonance becomes strongly asymmetric in the lateral direction and consequently results in a net transverse scattering force, that is, Fano interference-induced force. The magnitude of this transverse scattering force is comparable with the gradient force in conventional optical manipulation experiments. More interestingly, the Fano scattering force is ultrasensitive to the particle size and excitation frequency due to the phase sensitivity of the interference between adjacent plasmon modes in the particle. Utilizing this distinct feature, we show the possibility of size-selective sorting of silver and gold nanoparticles with an accuracy of about ±10 nm and silica-gold core-shell nanoparticles with shell thickness down to several nanometers. These results would add to the toolbox of optical manipulation and fabrication.
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Affiliation(s)
- Zhipeng Li
- Beijing Key Laboratory of Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University , Beijing 100048, PR China
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41
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Lau WF, Bai F, Huang Z. Ballistic glancing angle deposition of inclined Ag nanorods limited by adatom diffusion. NANOTECHNOLOGY 2013; 24:465707. [PMID: 24164870 DOI: 10.1088/0957-4484/24/46/465707] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The growth dynamics of 1D nanorods (NRs) composed of noble metals is ambiguous during glancing angle deposition (GLAD). The continuum equation (CE) model describes ballistic deposition limited by adatom diffusion, not verified in GLAD of noble metal NRs. In this work, GLAD is operated at Ts (substrate temperature) below room temperature to create inclined Ag NRs, and the CE fits the growth orientation of NRs with deposition angles at fixed Ts well. The CE fitting evaluates the diffusion activation energy (Ed) as 0.23 eV, showing that Ag NRs are poly-crystalline with dominant (111), as confirmed by XRD. This work introduces an effective approach to study the growth thermodynamics of 1D nanostructures and evaluate the Ed of adatoms with relatively low melting points.
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Affiliation(s)
- Wai-Fung Lau
- Department of Physics, Hong Kong Baptist University (HKBU), Kowloon Tong, Hong Kong SAR
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