Enhanced spatial terahertz modulation based on graphene metamaterial  

作　　者：孙丹丹 王梦奇 黄媛媛 周译玄 祁媚 江曼 任兆玉 

机构地区：[1]State Key Lab Incubation Base of Photoelectric Technology and Functional Materials, International Collaborative Center on Photoelectric Technology and Nano Functional Materials, School of Physics, Institute of Photonics Photon-Technology, Northwest University, Xi'an 710069, China

出　　处：《Chinese Optics Letters》2017年第5期58-61,共4页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61275105,61605160,and 61505162);the National Basic Research Program of China(No.2014DFR10780);the Foundation of the Education Committee of Shaanxi Province(No.14JK1756);the Science Foundation of Northwest University(No.13NW14)

摘　　要：The plasmonic mode in graphene metamaterial provides a new approach to manipulate terahertz （THz） waves. Graphene-based split ring resonator （SRR） metamaterial is proposed with the capacity for modulating trans- mitted THz waves under normal and oblique incidence. Here, we theoretically demonstrate that the resonant strength of the dipolar mode can be significantly enhanced by enlarging the arm-width of the SRR and by stack- ing graphene layers. The principal mechanism of light-matter interaction in graphene metamaterial provides a dynamical modulation based on the controllable graphene Fermi level. This graphene-based design paves the way for a myriad of important THz applications, such as optical modulators, absorbers, polarizers, etc.The plasmonic mode in graphene metamaterial provides a new approach to manipulate terahertz （THz） waves. Graphene-based split ring resonator （SRR） metamaterial is proposed with the capacity for modulating trans- mitted THz waves under normal and oblique incidence. Here, we theoretically demonstrate that the resonant strength of the dipolar mode can be significantly enhanced by enlarging the arm-width of the SRR and by stack- ing graphene layers. The principal mechanism of light-matter interaction in graphene metamaterial provides a dynamical modulation based on the controllable graphene Fermi level. This graphene-based design paves the way for a myriad of important THz applications, such as optical modulators, absorbers, polarizers, etc.

关 键 词：Light modulators METAMATERIALS MODULATION Ring gages Terahertz waves 

分 类 号：O441[理学—电磁学] TQ127.11[理学—物理]