基于编码超表面的双向太赫兹多波束调控器件  

Phase transition material based coding metasurface for two-way terahertz beam steering

作　　者：沈仕远 王元圣 池瑶佳 马新迎 杨青慧[1] 陈智[1] 文岐业[1] SHEN Shiyuan;WANG Yuansheng;CHI Yaojia;MA Xinying;YANG Qinghui;CHEN Zhi;WEN Qiye(School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu Sichuan 611731,China)

机构地区：[1]电子科技大学电子科学与工程学院,四川成都611731

出　　处：《太赫兹科学与电子信息学报》2021年第1期1-6,共6页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家自然科学基金资助项目(61831012,51572042);科学挑战计划资助项目(TZ2018003)。

摘　　要：基于相变材料二氧化钒(VO_(2))和编码超表面技术设计了一种双向太赫兹多波束调控器件。在0.7THz下,通过给予器件热激励控制VO_(2)的相变状态,可使器件在反射和透射两种工作模式间切换。器件温度高于68℃(VO_(2)相变温度)时,VO_(2)相变为金属态,器件工作在反射模式下,对太赫兹波进行高效反射并将入射波分为多束能量近似、方向不同的波束。在常温下,VO_(2)为绝缘态,器件工作在透射模式,对太赫兹波进行高效透射。对反射和透射两个方向波束的动态调控使器件本身不再成为透射或反射波传输的阻碍。这种对太赫兹多波束的动态双向调控在太赫兹无线通信场景中非常有用。A two-way terahertz beam steering device is designed and proposed based on phase change material vanadium dioxide(VO_(2))and coding metasurface technology.At 0.7 THz,by giving the device thermal excitation to control the phase transition state of VO_(2),the device can be switched between two working modes of reflection and transmission.When the device temperature is higher than 68℃(the phase change temperature of VO_(2)),the VO_(2)turns into metallic state,and the device works in reflection mode which means the device efficiently reflect and split the incident wave into several beams with similar energy and different directions.Under normal temperature,VO_(2)is in insulating state,and the device works in transmission mode to transmit terahertz wave efficiently.The dynamic control of beams in both directions of reflection and transmission makes the device itself no longer an obstacle to transmission of reflected or transmitted waves.This dynamic two-way control of the terahertz beam is very useful in terahertz wireless communication scenarios.

关 键 词：二氧化钒 编码超表面 动态波束调控 双向 太赫兹通信 

分 类 号：TN761.1[电子电信—电路与系统]