基于石墨烯杂化的类EIT太赫兹超表面仿真研究  

Simulation Research of Graphene Hybrid EIT-like Terahertz Metasurfaces

作　　者：孙凯 张景瑞 杨海波 李宇海 SUN Kai;ZHANG Jingrui;YANG Haibo;LI Yuhai(National Key Laboratory of Electromagnetic Space Security,Tianjin,China;China Institute of Marine Technology&Economy,Beijing,China)

机构地区：[1]电磁空间安全全国重点实验室,天津 [2]中国船舶集团有限公司综合技术经济研究院,北京

出　　处：《光电技术应用》2024年第5期52-56,共5页Electro-Optic Technology Application

摘　　要：太赫兹技术近年来受到各国研究者的重视,特别是针对太赫兹波的高效动态调制器件。提出了一种结合单层石墨烯与双金属环形类EIT结构的杂化太赫兹超表面调制器,该器件能够对类EIT效应实现调制且该器件具备偏振不敏感的优势。对该调制器件的电磁特性与调制能力进行了仿真分析,结果表明,双明模类EIT结构在0.565 THz处形成EIT峰,透射率达0.66。在石墨烯的调制作用下,杂化超表面EIT峰透射率的调制深度达44.9%,群延迟调制深度达22.8%。仿真结果验证了该杂化超表面对类EIT效应调制的有效性。该杂化超表面调制器在太赫兹通信、慢光调制等领域具有应用前景。Terahertz(THz)technology has received increasing attention from researchers worldwide in recent years,especially regarding efficient dynamic modulation devices for THz waves.A hybrid THz metasurface modulator combining monolayer graphene with a dual-metal ring electromagnetically induced transparency(EIT)-like structure is proposed,capable of modulating the EIT-like effect and possessing the advantage of polarization insensitivity.The electromagnetic properties and modulation capability of this modulator device are analyzed through simulation.The results indicate that the dual-mode EIT-like structure forms an EIT peak at O.565 THz with a transmission of 0.66.Under the modulation of graphene,the modulation depth of the hybrid metasurface EIT peak transmission reaches 44.9%,and the group delay modulation depth reaches 22.8%.Simulation results validate the effectiveness of the hybrid metasurface for modulating EIT-like effects.This hybrid metasurface modulator holds promising applications in THz communication,slow-light modulation,and other fields.

关 键 词：石墨烯 超表面 类EIT 动态调控 太赫兹 

分 类 号：O436[机械工程—光学工程]