圆偏光与石墨烯超表面相互作用的数值仿真  

Numerical simulation of the interaction between circular polarized lights and graphene metasurfaces

作　　者：胡莉[1] 席锋[1] 代洪霞[1] HU Li;XI Feng;DAI Hong-xia(School of Computer Science and Information Engineering,Chongqing Technology and Business University,Chongqing 400067,China)

机构地区：[1]重庆工商大学计算机科学与信息工程学院,重庆400067

出　　处：《大学物理》2022年第10期33-36,共4页College Physics

基　　金：重庆市高等教育教学改革重点研究项目(212071)资助。

摘　　要：借助有限元分析方法模拟了圆偏光与石墨烯超表面的相互作用,揭示了圆偏光激发下石墨烯超表面的远场和近场响应特性.模拟结果显示:圆偏光可以在中红外波段激发石墨烯超表面的表面等离激元共振,其共振吸收谱与入射光的极化方向无关,无远场手性响应.但其表面电荷分布、局域电场和局域手性场却和入射光的极化方向息息相关.这种数值仿真,有利于形象直观地展示圆偏光与电磁学的相关知识,加深学生对知识的理解,培养学生的创新意识.Based on the finite element method,the interaction between cirular polarized lights and graphene metasurfaces is simulated,which shows the properities of the far-field and near-field responses of graphene metasurfaces.Results show that the plasmonic resonances are stimulated by circular polarized lights at the mid-infrared region.The absorption spectra are independent with the polarized direction of incident lights,which results in zero far-field chiral responses.However,the surface charge distributions,the local electric fields and the chiral near-fields are closely related to the polarized direction of incident lights.Through numerical simulation,the knowledges of cirular polarized lights and electromagnetism can be shown vividly,which should deepen students’understanding and stimulate students’creative consciousness.

关 键 词：圆偏光 石墨烯 超表面 手性近场 

分 类 号：O4-4[理学—物理]