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Tuning of plasmonic behaviours in coupled metallic nanotube arrays 被引量:2
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作者 付少丽 李宏建 +3 位作者 谢素霞 周昕 徐海清 夏辉 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第8期363-368,共6页
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 ... 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. 展开更多
关键词 elliptical metallic nanotube array surface plasmons transmission spectrum field distributions
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