Unusual electromagnetic scattering by cylinders of topological insulator
Unusual electromagnetic scattering by cylinders of topological insulator
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拓扑绝缘体圆柱体的异常电磁散射
DOI：
10.1364/oe.22.030833
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发表时间：
2014-12-15
期刊：
影响因子：
3.8
通讯作者：
Zi, Jian
中科院分区：
文献类型：
--
作者：
Ge, Lixin;Zhan, Tianrong;Zi, Jian
拓扑绝缘体 (TI) 显示出由拓扑磁电 (TME) 效应引起的不寻常的光学响应。在本文中，我们从理论上研究了圆形 TI 圆柱体对电磁波的散射。在某些配置中，体散射可以被抑制，由于 TME 效应，导致瑞利和米氏散射区域中向后方向发生强散射。在反共振中，发现了传统介电圆柱体中不存在的有趣的场俘获现象。 (C) 2014年美国光学学会
Topological insulators (TIs) show unusual optical responses resulting from a topological magnetoelectric (TME) effect. In this paper, we study theoretically the scattering of electromagnetic waves by circular TI cylinders. In certain configurations, the bulk scattering can be suppressed, leading to strong scattering in the backward direction in both Rayleigh and Mie scattering regimes due to the TME effect. At antiresonances, an interesting filed trapping phenomenon is found which is absent in conventional dielectric cylinders. (C) 2014 Optical Society of America