Tuning of plasmonic behaviours in coupled metallic nanotube arrays

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

中国物理B ›› 2011, Vol. 20 ›› Issue (8): 87302-087302.doi: 10.1088/1674-1056/20/8/087302

Tuning of plasmonic behaviours in coupled metallic nanotube arrays

谢素霞¹, 周昕¹, 付少丽², 徐海清², 夏辉², 李宏建³

(1)College of Materials Science and Engineering, Central South University, Changsha 410083, China; (2)College of Physics Science and Technology, Central South University, Changsha 410083, China; (3)College of Physics Science and Technology, Central South University, Changsha 410083, China; College of Materials Science and Engineering, Central South University, Changsha 410083, China

收稿日期:2010-05-19 修回日期:2011-03-03 出版日期:2011-08-15 发布日期:2011-08-15
基金资助:
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).

Tuning of plasmonic behaviours in coupled metallic nanotube arrays

Fu Shao-Li(付少丽)^a), Li Hong-Jian(李宏建)^a)b), Xie Su-Xia(谢素霞)^b), Zhou Xin(周昕)^b), Xu Hai-Qing(徐海清)^a), and Xia Hui(夏辉)^a)†

^a College of Physics Science and Technology, Central South University, Changsha 410083, China; ^b College of Materials Science and Engineering, Central South University, Changsha 410083, China

Received:2010-05-19 Revised:2011-03-03 Online:2011-08-15 Published:2011-08-15
Supported by:
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).

摘要/Abstract

摘要： 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.

关键词: elliptical metallic nanotube array, surface plasmons, transmission spectrum, field distributions

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.

Key words: elliptical metallic nanotube array, surface plasmons, transmission spectrum, field distributions

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

73.20.Mf

78.68.+m (Optical properties of surfaces) 78.30.-j (Infrared and Raman spectra)

付少丽, 李宏建, 谢素霞, 周昕, 徐海清, 夏辉. Tuning of plasmonic behaviours in coupled metallic nanotube arrays[J]. 中国物理B, 2011, 20(8): 87302-087302.

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[J]. Chin. Phys. B, 2011, 20(8): 87302-087302.

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Tuning of plasmonic behaviours in coupled metallic nanotube arrays

Tuning of plasmonic behaviours in coupled metallic nanotube arrays

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