Rao Yunfei, Pan Ling, Ouyang Chunmei, Xu Quan, Liu Liyuan, Li Yanfeng, Gu Jianqiang, Tian Zhen, Han Jiaguang, Zhang Weili
Opt Express. 2020 Sep 28;28(20):29855-29864. doi: 10.1364/OE.404912.
Interest in asymmetric transmission (AT) at terahertz frequencies has increased dramatically in recent years. We present an all-silicon metamaterial to achieve the AT effect for linearly polarized electromagnetic waves in the terahertz regime. The metamaterial is constructed by rectangular silicon pillars and a thick silicon substrate. The magnetic Mie resonance excited by the incident polarized terahertz wave contributes to the AT effect, which is verified by the field distributions. In addition, the rotation angle and dimensions of the silicon pillars are shown to have a great influence on the AT efficiency. The proposed metamaterial with straightforward design has promising applications in polarization control scenarios.
近年来，人们对太赫兹频率下的非对称传输（AT）的兴趣急剧增加。我们提出了一种全硅超材料，以在太赫兹频段实现线偏振电磁波的AT效应。该超材料由矩形硅柱和厚硅衬底构成。入射偏振太赫兹波激发的磁米氏共振有助于实现AT效应，这一点通过场分布得到了验证。此外，硅柱的旋转角度和尺寸对AT效率有很大影响。所提出的这种设计简单的超材料在偏振控制场景中具有广阔的应用前景。
