基于磁束缚模式相消干涉的类EIT超材料  

A novel EIT-like metamaterial based on destructive interference between magnetic trapped modes

作　　者：唐雨竹 马文英[1,2] 魏耀华[1] 汪为民[3] TANG Yuzhu;MA Wenying;WEI Yaohua;WANG Weimin(School of Communication Engineering,Chengdu University of Information Technology,Chengdu Sichuan 610225,China;School of Optoelectronic and Information,University of Electronic Science and Technology of China,Chengdu Sichuan 610054,China;Institute of Optics and Electronics,Chinese Academy of Sciences,Chengdu Sichuan 610209,China)

机构地区：[1]成都信息工程大学通信工程学院,四川成都610225 [2]电子科技大学光电信息学院,四川成都610054 [3]中国科学院光电技术研究所,四川成都610209

出　　处：《太赫兹科学与电子信息学报》2018年第2期191-194,共4页Journal of Terahertz Science and Electronic Information Technology

基　　金：四川省科技厅应用基础研究资助项目(2017JY0332);中国博士后基金资助项目(2015M572456);成都信息工程大学科研基金资助项目(J201505)

摘　　要：提出一种具有电磁诱导透明(EIT)效应的太赫兹超材料。该结构单元由非对称排布的2对双金属线(a CWs)组成。当入射电场为垂直极化时,所提结构在0.580 8 THz附近产生磁束缚模式的相消干涉,形成一个Q值较高的异常透明峰。在单元中加入开口谐振环(SRR),SRRs与非对称双金属线对之间产生干涉,形成新的透明峰。加入SRRs后,2对双金属线干涉产生的透明峰的传感特性得到改善。仿真表明,aCWs以及其与SRRs组合而成的结构(a CWs/SRRs)可用于太赫兹的单频带通滤波、双频滤波以及传感。A novel Electromagnetically Induced Transparency(EIT)-like metamaterial of terahertz domain is presented.The unit cell consists of a couple of asymmetric Cut Wires(aCWs).When the incident electric field is perpendicularly polarized,the destructive interference between two magnetic trapped modes is observed at 0.580 8 THz,which produces an exotic transparent peak with high Q factor.A Split Ring Resonators(SRR)is added in aCWs,and a new resonant peak emerges due to the destructive interference of the SRRs and aCWs.The sensing performance of the transparent peak produced by aCWs is improved.Numerical simulations indicate that the aCWs and the structure composed by aCWs and SRRs(aCWs/SRRs)can be applied as single band and dual band bandpass filter in terahertz domain.The proposed structures provide new insight into designing EIT-like metamaterial.

关 键 词：电磁诱导透明 超材料 太赫兹 磁束缚模式 Q值 双频滤波 

分 类 号：TN04[电子电信—物理电子学]