Tunable Polarization States With Helical Metamaterials
Tunable Polarization States With Helical Metamaterials
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DOI：
10.1109/lpt.2012.2213078
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发表时间：
2012-08
影响因子：
2.6
通讯作者：
Zhenyu Yang;Ming Zhao;Peiyuan Xie;Lin Wu;Zeqin Lu;Peng Zhang
中科院分区：
文献类型：
--
作者：
Zhenyu Yang;Ming Zhao;Peiyuan Xie;Lin Wu;Zeqin Lu;Peng Zhang
本文基于一种螺旋形异向介质，研究了透射光的偏振态与入射角的关系。通过时域有限差分模拟，发现通过改变入射角可以调节透射光的偏振态。当角度从20°变化到-20°时，透射光的轴比从1：0.93变化到1：0.59。通过对螺旋线表面电流的分析，可以定性地解释这种可调极化现象。
In this letter, we demonstrate the relationship between the incident angles and the polarization states of transmitted beams on the basis of a kind of helical metamaterials. Through finite-difference time-domain simulations, it is found that the polarization states of the transmitted lights can be tuned by changing the incident angles. When the angles vary from 20° to -20°, the axial ratios of the transmitted lights have significant changes from 1:0.93 to 1:0.59. This phenomenon of the tunable polarization can be explained qualitatively through the analysis of the surface current on the helical wires.