激光技术2017，Vol.41Issue(5)：644-648,5.DOI:10.7510/jgjs.issn.1001-3806.2017.05.005
利用超表面天线阵列产生太赫兹涡旋光束
Generation of terahertz vortex beams base on metasurface antenna array
摘要
Abstract
In order to study characteristics of metasurface array of discontinuous phase L-shaped antenna in the 1st and 2nd order modes, by using the theory of scattering field with anomalous transmission, a L-shaped antenna structure was designed.By controlling the geometric parameters of the antenna and selecting the array element group, the coverage phase exceeded 2π.According to different topological charges, the vortex phase plates of the 1st order and the 2nd order were designed to produce different order vortex beams.The simulation results show that the simulation efficiency of the vertical polarization direction of the antenna element is about 55% when the incident wave is polarized vertically.When the phase covered 0~2π and 0~4π, the anomalous transmission angles of the linear array are different,-14.7° and-30° respectively.The results are consistent with the generalized Fresnel theory.This study has the important application value in the research of terahertz vortex beam devices.关键词
散射/太赫兹/超表面/异常透射/涡旋光束Key words
scattering/terahertz/metasurface/anomalous transmission/vortex beam分类
数理科学引用本文复制引用
李瑶,莫伟成,杨振刚,刘劲松,王可嘉..利用超表面天线阵列产生太赫兹涡旋光束[J].激光技术,2017,41(5):644-648,5.基金项目
国家自然科学基金资助项目(11574105 （）
61475054 （）
61405063 （）
61177095) （）
湖北省科技条件资源开发资助项目(2015BCE052) （2015BCE052）
