Switchable terahertz polarization converter based on VO_(2)metamaterial  

作　　者：Haotian Du Mingzhu Jiang Lizhen Zeng Longhui Zhang Weilin Xu Xiaowen Zhang Fangrong Hu 杜皓天;江明珠;曾丽珍;张隆辉;徐卫林;张小文;胡放荣(Guangxi Key Laboratory of Automatic Detecting Technology and Instrument,Guilin University of Electronic Technology,Guilin 541004,China;Guilin Institute of Information Technology,Guilin 541004,China)

机构地区：[1]Guangxi Key Laboratory of Automatic Detecting Technology and Instrument,Guilin University of Electronic Technology,Guilin 541004,China [2]Guilin Institute of Information Technology,Guilin 541004,China

出　　处：《Chinese Physics B》2022年第6期403-409,共7页中国物理B（英文版）

基　　金：supported in part by the National Natural Science Foundation of China(Grant Nos.62065005,61565004,11774288,and 62003107);the Natural Science Foundation of Guangxi Zhuang Autonomous Region,China(Grant Nos.2018GXNSFAA050043,2020GXNSFDA238019,2019JJB110033,and 2017GXNSFBA198029);the Innovation Project of Guangxi Graduate Education,China(Grant Nos.YCSW2021188,YCBZ2021071,and 2020YCXB04);the Foundation from Guangxi Key Laboratory of Automatic Detecting Technology and Instrument(Grant No.YQ21101);the Research and Development Project in Hunan Province,China(Grant No.2020SK2111)。

摘　　要：A switchable terahertz(THz)polarization converter based on vanadium dioxide(VO_(2)) metamaterial is proposed.It is a 5-layer structure which containing metal split-ring-resonator(SRR),the first polyimide(PI)spacer,VO_(2) film,the second PI spacer,and metal grating.It is an array structure and the period in x and y directions is 100μm.The performance is simulated by using finite integration technology.The simulation results show that,when the VO_(2) is in insulating state,the device is a transmission polarization converter.The cross-linear polarization conversion can be realized in a broadband of0.70 THz,and the polarization conversion rate(PCR)is higher than 99%.Under thermal stimulus,the VO_(2) changes from insulating state to metallic state,and the device is a reflective polarization converter.The linear-to-circular polarization conversion can be successfully realized in a broadband of 0.50 THz,and the PCR is higher than 88%.

关 键 词：SWITCHABLE terahertz(THz)metamaterial polarization conversion vanadium dioxide(VO_(2)) 

分 类 号：O441.4[理学—电磁学] TB34[理学—物理]