石墨烯巴比涅互补结构的太赫兹波透射行为  

Transmission of terahertz waves through graphene based on Babinet complementary structures

作　　者：李恒一 张权 赵伟[1] 郑虹[1] 朱玲[1] 

机构地区：[1]中国科学技术大学物理学院,安徽合肥230026

出　　处：《物理实验》2017年第12期6-9,13,共5页Physics Experimentation

基　　金：资助项目:仿真技术在大学物理实验中的应用及实践(No.2016jyxm1157)

摘　　要：利用CST电磁场仿真软件模拟设计了基于石墨烯巴比涅互补结构的太赫兹超材料,分别研究了互补层间距、石墨烯费米能级、互补层数对太赫兹波透射谱的影响.模拟结果表明:互补层之间的强烈耦合作用使得太赫兹波的透射得到显著增强;在间距较小时,共振频率随着间距增大而发生蓝移;在间距较大时,共振频率随着间距增大而发生红移,并且透射峰值强度大幅减弱;透射峰频率随着石墨烯费米能级减小而单调减小;增加耦合的互补层数,可使得透射频宽变宽.所设计结构可作为可调控的太赫兹带通滤波器使用.A type of graphene based Babinet complementary structure in terahertz range was proposed,and the effects of interspacing,graphene Fermi level and number of layers on transmission were simulated by the CST software.It was shown that the transmission was greatly enhanced by the interaction between layers.The resonance frequency had a blue shift for increasing interspacing when the spacing was small,while exhibited a red shift with increasing interspacing when the spacing was large enough.The resonance frequency decreased with the decreasing Fermi level of graphene.Increasing the number of layers broadened the transmission bandwidth.The proposed structure could be used as a tunable terahertz band-pass filter.

关 键 词：透射率 太赫兹波 石墨烯 巴比涅互补结构 超材料 CST 

分 类 号：O43[机械工程—光学工程]