文献类型：期刊文献

英文题名：Terahertz broadband polarization converter based on the double-split ring resonator metasurface

作者：Xu, Zhenhua[1];Sheng, Hongyu[2,3];Wang, Qiaolian[1];Zhou, Liuping[1];Shen, Yanchun[1,4]

第一作者：Xu, Zhenhua

通讯作者：Shen, YC[1];Sheng, HY[2];Sheng, HY[3]

机构：[1]Guangzhou Railway Polytech, Engn Inst, Guangzhou 510432, Peoples R China;[2]Beijing Union Univ, Beijing Key Lab Informat Serv Engn, Beijing, Peoples R China;[3]Beijing Union Univ, Coll Robot, Beijing, Peoples R China;[4]Tianjin Univ, Sch Precis Instruments & Optoelect Engn, Inst Laser & Optoelect, Tianjin 300072, Peoples R China

第一机构：Guangzhou Railway Polytech, Engn Inst, Guangzhou 510432, Peoples R China

通讯机构：[1]corresponding author), Guangzhou Railway Polytech, Engn Inst, Guangzhou 510432, Peoples R China;[2]corresponding author), Beijing Union Univ, Beijing Key Lab Informat Serv Engn, Beijing, Peoples R China;[3]corresponding author), Beijing Union Univ, Coll Robot, Beijing, Peoples R China.|[1141739]北京联合大学机器人学院;[11417]北京联合大学;[11417103]北京联合大学北京市信息服务工程重点实验室;

年份：2021

卷号：3

期号：9

外文期刊名：SN APPLIED SCIENCES

收录：EI(收录号：20213210738790);Scopus(收录号：2-s2.0-85112013763);WOS:【ESCI(收录号:WOS:000680549500001)】；

基金：This work was supported by the High-level Scientific Research Foundation for the introduction of talent of Guangzhou Railway Polytechnic (Grant No. GTXYR2004). On behalf of all authors, the corresponding author states that there is no conflict of interest.

语种：英文

外文关键词：Terahertz; Metasurface; Broadband; Double-split ring resonator; Polarization converter

摘要：A terahertz broadband polarization converter based on the metasurface of a double-split ring resonator is proposed. The structural parameters of this device have been optimized in numerical simulations. The results show that in the frequency range from 0.49 to 1.88 THz (bandwidth of 1.39 THz) the proposed device rotates incident linearly polarized waves through 90 degrees. The polarization conversion rate is more than 80%. The coefficient of reflection for cross polarization is greater than 90% with a transmission loss of 1 dB. The surface current distribution of this structure was simulated and analyzed at three frequencies that give high conversion rates of the polarization. The mechanism underlying this high conversion rate is presented, and the dependence of the conversion rate on incident angle and polarization angle is stimulated and analyzed. The results show that the conversion performance of this device is good for incidence angles ranging from 0 to 30 degrees and polarization angles ranging from - 10 to 10 degrees. Compared with previous designs, the polarization converter has a simple structure and a broad operational bandwidth. It has potential applications in the field of terahertz polarization modulation.