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

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

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.

Keywords: metal nanowire shape of terminus surface plasmon polariton modes mode decomposition

Received: 20 December 2013
Revised: 18 March 2014
Accepted manuscript online:

PACS:	73.20.Mf	(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
	42.82.Et	(Waveguides, couplers, and arrays)
	81.07.Gf	(Nanowires)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2010CB923202).

Corresponding Authors: Yang Shu
E-mail: syang@bupt.edu.cn

About author: 73.20.Mf; 42.82.Et; 81.07.Gf

Cite this article:

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


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

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