http://scholars.ntou.edu.tw/handle/123456789/1752
標題: | Topological magnetoelectric effect as probed by nanoshell plasmonic modes | 作者: | Railing Chang Huai-Yi Xie Ya-Chih Wang Hai-Pang Chiang P.T. Leung |
關鍵字: | Surface plasmons;Axion electrodynamics;Topological insulator | 公開日期: | 十二月-2019 | 卷: | 15 | 起(迄)頁: | 102744 | 來源出版物: | Results in Physics | 摘要: | Axion electrodynamics is applied to study the response of a plasmonic nanoshell with a core made of topological insulator (TI) materials. The electric polarizability of such a system is calculated in the long wavelength limit via the introduction of two scalar potentials satisfying the various appropriate boundary conditions. Our focus is on the topological magneto-electric effect (TME) as manifested in the coupled plasmonic resonances of the nanoshell. It is found that for a TI with broken time-reversal symmetry, such TME will lead to observable red-shifts in the coupled plasmonic modes, with more significant manifestation of such shifts for the bonding modes of a metallic nanoshell. It is speculated that such universal red-shift could be a manifestation of the fundamental dual symmetry as generalized for axion electrodynamics. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/1752 | ISSN: | 2211-3797 | DOI: | 10.1016/j.rinp.2019.102744 |
顯示於: | 光電與材料科技學系 |
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