Mutual conversion and asymmetric transmission of linearly polarized light in bilayered chiral metamaterial.
Mutual conversion and asymmetric transmission of linearly polarized light in bilayered chiral metamaterial.
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DOI：
10.1364/oe.22.025679
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发表时间：
2014-10
期刊：
影响因子：
3.8
通讯作者：
Yiqun Xu;Quanchao Shi;Zheng Zhu;Jinhui Shi
中科院分区：
文献类型：
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作者：
Yiqun Xu;Quanchao Shi;Zheng Zhu;Jinhui Shi
我们提出了一种平面手性光学超材料，它由两层相互连接的I型谐振器组成，并以90°的扭角排列。数值模拟结果表明，该方案可以在光区实现线偏振波的互偏振转换和双频非对称传输。对于正向传输，双层超材料中的x-y和y-x偏振转换分别由同心和偏心的C型二聚体引起。给出了双层超材料在谐振频率下的电流分布，解释了双频非对称传输。偏振转换效率和谐振频率可以通过参数研究进行修正。
We propose a kind of planar chiral optical metamaterial consisting of two layers of connected I-shape resonators arranged by a twist angle of 90°. Numerical simulation results demonstrate that our scheme can realize a mutual polarization conversion and dual-band asymmetric transmission for linearly polarized waves in the optical regime. For the forward propagation, the x-to-y and y-to-x polarization conversions in the proposed bilayered metamaterial result from the concentric and eccentric C-shaped dimers, respectively. The current distributions of bilayered metamaterials at the resonant frequencies are presented to interpret the dual-band asymmetric transmission. The polarization conversion efficiency and resonant frequencies can be modified via parametric study.