中国物理B ›› 2014, Vol. 23 ›› Issue (11): 117302-117302.doi: 10.1088/1674-1056/23/11/117302

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Polarization dependence of the light coupling to surface plasmons in an Ag nanoparticle & Ag nanowire system

杨超杰a, 赵华波a, 王培培a, 李洁a, 唐鹏a, 曲胜春b, 林峰a, 朱星a c   

  1. a School of Physics, Peking University, Beijing 100871, China;
    b Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
    c National Center for Nanoscience and Technology, Beijing 100190, China
  • 收稿日期:2014-04-25 修回日期:2014-06-16 出版日期:2014-11-15 发布日期:2014-11-15
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant Nos. 2012CB933004 and 2007CB936801), the National Natural Science Foundation of China (Grant Nos. 11374023, 61176120, and 60977015), the National Undergraduate Innovational Experimentation Program, China, and the National Fund for Fostering Talents of Basic Science (NFFTBS), China (Grant Nos. J1030310 and J1103205).

Polarization dependence of the light coupling to surface plasmons in an Ag nanoparticle & Ag nanowire system

Yang Chao-Jie (杨超杰)a, Zhao Hua-Bo (赵华波)a, Wang Pei-Pei (王培培)a, Li Jie (李洁)a, Tang Peng (唐鹏)a, Qu Sheng-Chun (曲胜春)b, Lin Feng (林峰)a, Zhu Xing (朱星)a c   

  1. a School of Physics, Peking University, Beijing 100871, China;
    b Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
    c National Center for Nanoscience and Technology, Beijing 100190, China
  • Received:2014-04-25 Revised:2014-06-16 Online:2014-11-15 Published:2014-11-15
  • Contact: Lin Feng E-mail:linf@pku.edu.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant Nos. 2012CB933004 and 2007CB936801), the National Natural Science Foundation of China (Grant Nos. 11374023, 61176120, and 60977015), the National Undergraduate Innovational Experimentation Program, China, and the National Fund for Fostering Talents of Basic Science (NFFTBS), China (Grant Nos. J1030310 and J1103205).

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摘要：

Polarization dependence of the coupling of excitation light to surface plasmon polaritons (SPPs) was investigated in a Ag nanoparticle-nanowire waveguide system (a Ag nanoparticle attached to a Ag nanowire). It was found that under the illumination of excitation light on the nanoparticle-nanowire junction, the coupling efficiency of light to SPPs depends on the polarization of the excitation light. Theoretical simulations revealed that it is the local near-field coupling between the nanoparticle and the nanowire that enhances the incident light to excite the nanowire SPPs. Because the shapes of the Ag nanoparticles differ, the local field intensity, and thus the excitement of the nanowire SPPs, vary with the polarization of the excitation light.

关键词: Ag nanowire, Ag nanoparticle, surface plasmon, local near field

Abstract:

Polarization dependence of the coupling of excitation light to surface plasmon polaritons (SPPs) was investigated in a Ag nanoparticle-nanowire waveguide system (a Ag nanoparticle attached to a Ag nanowire). It was found that under the illumination of excitation light on the nanoparticle-nanowire junction, the coupling efficiency of light to SPPs depends on the polarization of the excitation light. Theoretical simulations revealed that it is the local near-field coupling between the nanoparticle and the nanowire that enhances the incident light to excite the nanowire SPPs. Because the shapes of the Ag nanoparticles differ, the local field intensity, and thus the excitement of the nanowire SPPs, vary with the polarization of the excitation light.

Key words: Ag nanowire, Ag nanoparticle, surface plasmon, local near field

中图分类号:  (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

  • 73.20.Mf
78.67.Bf (Nanocrystals, nanoparticles, and nanoclusters) 78.20.Bh (Theory, models, and numerical simulation)