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

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 ju...

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Published inChinese physics B Vol. 23; no. 11; pp. 489 - 495
Main Author 杨超杰 赵华波 王培培 李洁 唐鹏 曲胜春 林峰 朱星
Format Journal Article
LanguageEnglish
Published 01.11.2014
Subjects
Excitation
Illumination
Joining
Nanoparticles
Nanowires
Plasmons
Polarization
Silver
Simulation
SPP
偏振相关
光耦合
纳米线
纳米银
纳米颗粒
表面等离子体激元
银纳米粒子
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/23/11/117302

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Summary: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.
Bibliography: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.
fang Chao-Jie, Zhao Hua-Bo, Wang Pei-Pei, Li Jie, Tang Peng, Qu Sheng-Chun, Lin Feng, and Zhu Xing（ 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 Nanoseience and Technology, Beijing 100190, China
11-5639/O4
Ag nanowire, Ag nanoparticle, surface plasmon, local near field
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/11/117302