Active control of polarization-dependent near-field coupling in hybrid metasurfaces
Active control of polarization-dependent near-field coupling in hybrid metasurfaces
复制标题
混合超表面中偏振相关近场耦合的主动控制
DOI：
10.1063/1.5040162
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发表时间：
2018-08-06
影响因子：
4
通讯作者：
Zhang, Weili
中科院分区：
文献类型：
--
作者：
Chen, Xieyu;Ghosh, Shuprio;Zhang, Weili
We present experimental results of actively controlled anisotropic near-field coupling in a metamaterial composed of two concentric in-plane split ring resonators and a closed-ring resonator functioning at terahertz (THz) frequencies. Transparency windows are observed due to the coupling effect between two dipole-like modes for both polarizations of the THz field, but at different frequencies. By properly incorporating silicon islands into the metamaterial unit cells, the transparency windows can be optically controlled with a modulation depth reaching 68% and 62% for horizontal and vertical polarizations, respectively. The results are of value for designing active THz anisotropic devices. Published by AIP Publishing.
