光学学报, 2020, 40 (7): 0713001, 网络出版: 2020-04-15   

太赫兹V-形错位超表面异常折射振幅调控研究 下载: 1076次

Manipulation on Amplitude of Anomalous Refraction in Staggered Terahertz V-Shaped Metasurface
作者单位
1 南昌大学材料科学与工程学院, 江西 南昌 330031
2 南昌大学物理系, 江西 南昌 330031
3 南昌大学空间科学与技术研究院, 江西 南昌 330031
4 中国科学院上海微系统与信息技术研究所太赫兹固态技术重点实验室, 上海 200050
摘要
提出了每个超晶胞由8个不同V-形天线组成的双周期超晶胞错位超表面结构,并从理论和实验上研究了其特性。计算表明,当横电光垂直入射时,会得到共偏振透射和交叉偏振异常折射。通过调节两个超晶胞周期单元的横向错开距离,可改变异常折射的相位差,调控其振幅。实验结果表明,当4.3 THz的光垂直入射到两个超晶胞周期单元横向错开距离为0,2,4,6个V-形单元的样品上时,异常折射光强分别为入射光强的3.6%,1.7%,0.7%,1.9%,与计算结果一致。
Abstract
A staggered metasurface structure that consists of double-periodic supercells with eight different V-shaped antennas is proposed and its properties are studied theoretically and experimentally. The calculation shows that co-polarized transmission and cross-polarized anomalous refraction can be obtained when the transverse electric light is incident vertically. The phase difference of anomalous refraction can be changed and its amplitude can be regulated by adjusting the transverse misalignment distance between two periodic supercell units. The experimental results show that, when the 4.3 THz light is vertically incident on the samples with two supercells staggered by 0, 2, 4 and 6 V-shaped antenna unit cells, the anomalous refraction intensities are 3.6%, 1.7%, 0.7%, and 1.9% of the incident light intensity, respectively, which is consistent with the calculated results.

汪云, 章少华, 沈云, 邓晓华, 罗小青. 太赫兹V-形错位超表面异常折射振幅调控研究[J]. 光学学报, 2020, 40(7): 0713001. Yun Wang, Shaohua Zhang, Yun Shen, Xiaohua Deng, Xiaoqing Luo. Manipulation on Amplitude of Anomalous Refraction in Staggered Terahertz V-Shaped Metasurface[J]. Acta Optica Sinica, 2020, 40(7): 0713001.

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