太赫兹波束可调谐的编码超表面设计  

Coding metasurface design for terahertz beam shaping

作　　者：李增霖 唐华伟 徐文霞 杨耸岳 史金辉[1] LI Zenglin;TANG Huawei;XU Wenxia;YANG Songyue;SHI Jinhui(Key Laboratory of In-Fiber Integrated Optics of Ministry of Education,School of Physics and Optoelectronic Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学物理与光电工程学院纤维集成光学教育部重点实验室,哈尔滨150001

出　　处：《电波科学学报》2021年第6期932-937,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(U1931121);黑龙江省自然基金重点项目(ZD2020F002,ZD2018015);111引智基地项目;中央高校基本科研业务费(3072020CFT2501);黑龙江省博士后启动基金(LBH-Q9097)。

摘　　要：编码超表面可以通过编码序列设计对波束进行灵活调控,文中提出一种基于二氧化钒(VO_(2))的可调谐太赫兹编码超表面.设计中借助可调谐单元与不可调谐单元,通过VO_(2)由绝缘态到金属态的相变,在0.97 THz处实现了多种远场波束的动态切换.此外,还设计了双频带太赫兹编码超表面,在0.97和1.97 THz两个不同频率下均可实现双波束.这项工作为设计可调谐编码超表面、实现波束间灵活调控开辟了一条新的途径,将在通信和雷达领域具有广泛的应用前景.Due to flexible beam manipulation,coding metasurface has received tremendous interest.A tunable terahertz coding metasurface based on vanadium dioxide is proposed in this paper.With the help of tunable unit and non-tunable unit,a tunable terahertz coding metasurface is designed by use of the phase transition of vanadium dioxide from insulating to metallic state.In addition,a dual-band terahertz coding metasurface is designed to realize dual beam manipulation at both 0.97 and 1.97 THz.This work opens up a new way to design tunable coding metasurface and realize flexible beam control.It will be important for promising applications in the fields of communication and radar.

关 键 词：编码超表面 二氧化钒(VO_(2)) 波束调控 太赫兹波 

分 类 号：O441.4[理学—电磁学]