Theoretical study on dynamical planar-chirality switching in checkerboard-like metasurfaces
Theoretical study on dynamical planar-chirality switching in checkerboard-like metasurfaces
复制标题
DOI：
10.1051/epjam/2016016
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Y. Urade;Y. Nakata;T. Nakanishi;M. Kitano
中科院分区：
文献类型：
--
作者：
Y. Urade;Y. Nakata;T. Nakanishi;M. Kitano
在本文中，我们表明，手征的棋盘状的平面超颖表面可以动态切换通过调制的超颖表面结构的局部薄层阻抗。提出了一种实现旋向切换的超表面设计方案，并基于巴比涅原理对其电磁特性进行了理论分析。数值模拟所提出的超颖表面进行验证的理论分析。它表明，圆偏振波的非对称传输的极性，这是由超颖表面的平面手征性，反转通过切换在棋盘状结构的互连点的薄层阻抗。非对称传输的物理起源进行了讨论的表面电流和超颖表面上的电荷分布。
In this paper, we show that the handedness of a planar chiral checkerboard-like metasurface can be dynamically switched by modulating the local sheet impedance of the metasurface structure. We propose a metasurface design to realize the handedness switching and theoretically analyze its electromagnetic characteristic based on Babinet’s principle. Numerical simulations of the proposed metasurface are performed to validate the theoretical analysis. It is demonstrated that the polarity of asymmetric transmission for circularly polarized waves, which is determined by the planar chirality of the metasurface, is inverted by switching the sheet impedance at the interconnection points of the checkerboard-like structure. The physical origin of the asymmetric transmission is also discussed in terms of the surface current and charge distributions on the metasurface.