Tunable polarization rotation using non-chiral all-dielectric metasurfaces
Tunable polarization rotation using non-chiral all-dielectric metasurfaces
复制标题
使用非手性全电介质超表面可调谐偏振旋转
DOI：
10.1016/j.ijleo.2019.163769
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发表时间：
2020
期刊：
影响因子：
3.1
通讯作者：
Huang Lirong
中科院分区：
文献类型：
--
作者：
Cai Xiaodong;Li Zhiwei;Kong Yong;Lu Dunke;Wei Yunbing;Huang Lirong
在本文中，我们从理论和数值研究非手性全介质超颖表面控制线偏振光的偏振角在1550 nm的电信波长。与传统的手性超颖表面相比，其中光学活性是对两个圆偏振分量的弱响应的结果，我们的偏振旋转器在单位单元中采用两个硅天线作为四分之一波片来产生左和右圆偏振光。透射的线偏振光的偏振方向随后由两个相反的圆偏振光之间的相位延迟决定。为了证明这一概念，我们对一系列超表面进行了建模，改变圆偏振光之间的相位差，以产生偏振角从0°到90°的线性偏振光。我们相信，我们的研究结果将进一步扩大和促进新的应用的超表面。
In this paper, we theoretically and numerically investigate non-chiral all-dielectric metasurfaces for controlling the polarization angle of linearly polarized light at a 1550 nm telecommunication wavelength. In contrast to conventional chiral metasurfaces, where optical activity is a result of a weak response to two circularly polarized components, our polarization rotator employs two silicon antenna in a unit cell as quarter-wave plates to generate left and right circularly polarized light. The polarization orientation of the transmitted linearly polarized light is subsequently decided by the phase retardation between the two opposite circularly polarized light beams. To demonstrate the concept, we modeled a series of metasurfaces, varying the phase differences between the circularly polarized light beams, to generate linearly polarized light with polarization angles ranging from 0° to 90°. We believe that our findings will further expand and promote new applications of metasurfaces.