石墨烯超材料等离诱导透明特性和光电开关设计  

Plasmon-Induced Transparency Effect and Photoelectric Switch Design Based on Graphene Metamaterial

作　　者：周凤麒 王嘉伟 刘志敏 张箫 刘婷 孙丽文 Zhou Fengqi;Wang Jiawei;Liu Zhimin;Zhang Xiao;Liu Ting;Sun Liwen(School of Science,East China Jiaotong University,Nanchang 330013,Jiangxi,China)

机构地区：[1]华东交通大学理学院,江西南昌330013

出　　处：《光学学报》2023年第2期150-157,共8页Acta Optica Sinica

基　　金：国家自然科学基金(12164018,11847026,61764005,11804093);江西省自然科学基金(20224ACB201008,20202BABL201019,20202ACBL212005);江西省教育厅科学基金(GJJ210603)。

摘　　要：基于单层图案化石墨烯超材料在太赫兹波段实现了等离子诱导透明效应,利用耦合模式理论(CMT)分析了等离子诱导透明产生的机理,得到的理论结果与时域有限差分方法计算的结果高度一致。通过调节石墨烯费米能级对等离子诱导透明特性进行了动态调控,并实现了多模同步异步开关的设计,在2.16、3.01、3.84 THz三个频率处的振幅调制度分别为95.77%、83.42%、95.58%,消光比最高可达13.73 dB。对慢光效应的研究结果表明群折射率可达180。本研究为设计光电子器件提供方案和指导。Objective Surface plasma polaritons(SPPs)have been greatly promoted in recent years in the field of nano-photonology.There have been many studies which show that the SPPs can be generated on the surface of graphene and dielectric,and plasma induced transparency(PIT)effect due to the interaction between the incident light and the structure as an abnormal transmission phenomenon has been studied generally.With the advantage of dynamic modulation,the graphene has greater advantages than the precions metal materials in PIT effect,which has been proven to play a key role in the next generation of photonic devices such as photoelectric switches,sensors,and slow-light devices.The PIT effect based on patterned graphene metamaterials has evolved towards multi-layered complex structures that can achieve very excellent electromagnetic properties.However,complex patterned graphene is difficult to be produced and put into use limited by the development of nanomanufacturing technology.It is very significant to study the simple structure and high quality PIT effect for the manufacture and application of PIT devices in experiment and real life.At the same time,designing simple,manufacturable structures to produce high-quality multi-mode PIT is of great significance to the development of the SPPs field.It will also greatly promote the rapid development and application of photonic devices based on PIT effect.Methods In this paper,the PIT effect of monolayer patterned graphene metamaterials is studied by combining numerical simulation of electromagnetic field via finite-difference time-domain(FDTD)and theoretical calculation via coupled-mode theory(CMT).We design a single-layer metamaterial structure composed of graphene blocks and graphene strips,use FDTD solution for electromagnetic field simulation calculations to observe the transmission and power field local,and thus analyze the interaction between the light-dark mode and the incident light.Next,by deducing the theoretical formula of graphene surface conductivity,the effect of

关 键 词：材料 表面等离子体 石墨烯 等离子诱导透明 电光开关 

分 类 号：O436[机械工程—光学工程]