激光技术, 2017, 41 (5): 644, 网络出版: 2017-09-21   

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
作者单位
华中科技大学 武汉光电国家实验室, 武汉 430074
摘要
为了研究1阶和2阶模式下的非连续性相位L型天线的超表面阵列特性, 采用异常透射的散射场理论, 设计了一种L型天线结构, 控制天线的几何参量, 选取阵列单元组, 使得其覆盖相位超过2π。并根据不同的拓扑荷 , 设计1阶和2阶涡旋相位板, 产生不同阶数涡旋光束。结果表明, 用太赫兹线偏光垂直入射时, 天线单元垂直偏振透射方向的模拟仿真效率达到55%左右; 相位覆盖0~2π和0~4π时, 其线性阵列的异常透射角不同, 分别为-14.7°和-30°, 其结果与广义斯涅耳定理一致。此研究对太赫兹涡旋光束的器件研究有重要的应用价值。
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.

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. LI Yao, MO Weicheng, YANG Zhengang, LIU Jinsong, WANG Kejia. Generation of terahertz vortex beams base on metasurface antenna array[J]. Laser Technology, 2017, 41(5): 644.

本文已被 5 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!