Tuning of plasmonic behaviours in coupled metallic nanotube arrays

doi:10.1088/1674-1056/20/8/087302

Abstract We theoretically investigate the influence of the shape of nanoholes on plasmonic behaviours in coupled elliptical metallic nanotube arrays by the finite-difference time-domain (FDTD) method. We study the structure in two cases: one for the array aligned along the minor axis and the other for the array aligned along the major axis. It is found that the optical properties and plasmonic effects can be tuned by the effective surface charges as a result of the variation in the minor axis length. Based on the localized nature of electric field distributions, we also clearly show that the presence of localized plasmon resonant modes originates from multipolar plasmon polaritons and a large magnitude of opposing surface charges build up in the gap between adjacent nanotubes.

Keywords: elliptical metallic nanotube array surface plasmons transmission spectrum field distributions

Received: 19 May 2010
Revised: 03 March 2011
Accepted manuscript online:

PACS:	73.20.Mf	(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
	78.68.+m	(Optical properties of surfaces)
	78.30.-j	(Infrared and Raman spectra)

Fund: Project supported by the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20100162110068), the Graduate Education Innovation Project of Central South University (Grant No. 2010ssxt010), and the Hunan Provincial Innovation Foundation for Postgraduate (Grant No. CX2009B029).

Cite this article:

Fu Shao-Li(付少丽), Li Hong-Jian(李宏建), Xie Su-Xia(谢素霞), Zhou Xin(周昕), Xu Hai-Qing(徐海清), and Xia Hui(夏辉) Tuning of plasmonic behaviours in coupled metallic nanotube arrays 2011 Chin. Phys. B 20 087302

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