Effects of shape of terminus on excitation of surfaceplasmon modes on metal nanowires

doi:10.1088/1674-1056/23/10/107305

中国物理B ›› 2014, Vol. 23 ›› Issue (10): 107305-107305.doi: 10.1088/1674-1056/23/10/107305

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

Effects of shape of terminus on excitation of surfaceplasmon modes on metal nanowires

乔雅楠, 杨树

Department of Physics, School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876, China

收稿日期:2013-12-20 修回日期:2014-03-18 出版日期:2014-10-15 发布日期:2014-10-15
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2010CB923202).

Effects of shape of terminus on excitation of surfaceplasmon modes on metal nanowires

Qiao Ya-Nan (乔雅楠), Yang Shu (杨树)

Department of Physics, School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2013-12-20 Revised:2014-03-18 Online:2014-10-15 Published:2014-10-15
Contact: Yang Shu E-mail:syang@bupt.edu.cn
About author:73.20.Mf; 42.82.Et; 81.07.Gf
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2010CB923202).

摘要/Abstract

摘要： The effects of the shape of a nanowire terminus on the excited surface plasmon polariton (SPP) modes are investigated. The conical terminus and terminus cut at a certain angle are studied. For the first time, the quantitative mode decompositions are carried out to derive the full information about excited SPP modes. It is demonstrated that tuning the shape of the terminus provides an effective method to control the composition of excited SPP modes on metal nanowires. It is especially found that some important patterns, such as the pure TM₀ mode and the superposition of TM₀ and HE₊₁ or HE_-1 modes, can be generated by some specific shapes of the terminus, whereas there is no way to produce these patterns using flat-end nanowires.

关键词: metal nanowire, shape of terminus, surface plasmon polariton modes, mode decomposition

Abstract: The effects of the shape of a nanowire terminus on the excited surface plasmon polariton (SPP) modes are investigated. The conical terminus and terminus cut at a certain angle are studied. For the first time, the quantitative mode decompositions are carried out to derive the full information about excited SPP modes. It is demonstrated that tuning the shape of the terminus provides an effective method to control the composition of excited SPP modes on metal nanowires. It is especially found that some important patterns, such as the pure TM₀ mode and the superposition of TM₀ and HE₊₁ or HE_-1 modes, can be generated by some specific shapes of the terminus, whereas there is no way to produce these patterns using flat-end nanowires.

Key words: metal nanowire, shape of terminus, surface plasmon polariton modes, mode decomposition

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

73.20.Mf

42.82.Et (Waveguides, couplers, and arrays) 81.07.Gf (Nanowires)

乔雅楠, 杨树. Effects of shape of terminus on excitation of surfaceplasmon modes on metal nanowires[J]. 中国物理B, 2014, 23(10): 107305-107305.

Qiao Ya-Nan (乔雅楠), Yang Shu (杨树). Effects of shape of terminus on excitation of surfaceplasmon modes on metal nanowires[J]. Chin. Phys. B, 2014, 23(10): 107305-107305.

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Effects of shape of terminus on excitation of surfaceplasmon modes on metal nanowires

Effects of shape of terminus on excitation of surfaceplasmon modes on metal nanowires

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