Modes splitting in graphene-based double-barrier waveguides  

作　　者：有四普 何英 杨艳芳 张惠芳 

机构地区：[1]Department of Physics, College of Sciences, Shanghai University, Shanghai 200444, China

出　　处：《Chinese Physics B》2017年第3期226-230,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11204170 and 61108010);the Shanghai Municipal Commission of Science and Technology,China(Grant No.16ZR1411600)

摘　　要：The graphene-based double-barrier waveguides induced by electric field have been investigated. The guided modes can only exist in the case of Klein tunneling, and the fundamental mode is absent. The guided modes in the single-barrier waveguide split into symmetric and antisymmetric modes with different incident angles in the double-barrier waveguide. The phase difference between electron states and hole states is also discussed. The phase difference for the two splitting modes is close to each other and increases with the order of guided modes. These phenomena can be helpful for the potential applications in graphene-based optoelectronic devices.The graphene-based double-barrier waveguides induced by electric field have been investigated. The guided modes can only exist in the case of Klein tunneling, and the fundamental mode is absent. The guided modes in the single-barrier waveguide split into symmetric and antisymmetric modes with different incident angles in the double-barrier waveguide. The phase difference between electron states and hole states is also discussed. The phase difference for the two splitting modes is close to each other and increases with the order of guided modes. These phenomena can be helpful for the potential applications in graphene-based optoelectronic devices.

关 键 词：GRAPHENE double-barrier waveguides modes splitting 

分 类 号：O613.71[理学—无机化学]