THz超材料的明暗模式耦合效应  

Coupling effect of bright and dark modes in THz metamaterials

作　　者：袁宇阳 张慧芳[2] 张学迁 谷建强[2] 胡放荣[1,3] 熊显名 张文涛[1,3] 韩家广 

机构地区：[1]桂林电子科技大学电子工程与自动化学院,广西桂林541000 [2]天津大学精密仪器与光电子工程学院THz波研究中心,天津300072 [3]广西高校光电信息处理重点实验室,广西桂林541000

出　　处：《红外与激光工程》2018年第1期253-263,共11页Infrared and Laser Engineering

基　　金：国家自然科学基金(61565004);桂林市科学研究与技术开发课题(20140127-1,20150133-3)

摘　　要：随着人工超材料对电磁诱导透明(EIT)现象的成功模拟,超材料明暗模间的耦合机制引起了广泛关注。回顾了近年来在太赫兹(THz)波段基于人工超材料的明暗模耦合效应的相关研究进展,包括平面结构EIT效应,立体结构EIT效应,明暗模垂直耦合电磁诱导吸收(EIA)效应,以及表面波非对称激发。组成超材料的单元结构内部的模式耦合机制对超材料的远场近场响应具有决定性的作用,其不同的耦合机制在光开关、慢光器件、光传感器、片上系统等的设计方面有重大的潜在应用价值。The coupling mechanism of bright and dark modes in metamaterials have got enormous attention after the vivid mimicking of electromagnetically induced transparency（EIT） with plasmonic metamaterials. The research progress based on the coupling effects of bright and dark modes over the past few years was reviewed, including the EIT by planar metamaterials, the EIT effect with stereo metamaterials, electromagnetically induced absorption（EIA） from vertically coupling of bright and dark modes and asymmetric excitation of surface wave. The inner mode-coupling mechanism in each unit cell which consisted of the metamaterial determined the far-field and near-field responses. These different coupling mechanisms had important promising value in the designing of functional devices, like optical switch, slow-light devices, sensitive optical sensor and on-chip optical system.

关 键 词：超材料 明暗模 EIT EIA 表面波非对称激发 

分 类 号：O433[机械工程—光学工程]