Transmittance characteristics of the plasmonic graphene ribbon with a wing

6th conference on Advances in Optoelectronics and Micro/nano-optics

Yuan, Lin^1,2 ; Yan, Xin^1,2 ; Wang, Yueke^1,2 ; Sang, Tian^1,2 ; Yang, Guofeng^1,2

Optical Information Science and Technology Department, Jiangnan University, Wuxi, JIANGSU

214122, China^1

Optoelectronic Engineering and Technology Research Center, Jiangnan University, Wuxi, JIANGSU

214122, China^2

关键词: Dispersion relations;    Gate voltages;    Graphene plasmons;    Graphene ribbons;    Mode distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/844/1/012023/pdf
DOI  :  10.1088/1742-6596/844/1/012023

来源: IOP

【 摘 要 】

We investigate the transmittance characteristics of graphene ribbons with a wing numerically by Finite Element Method. By conducting the dispersion relation of edge graphene plasmons (EGPs) modes and analyzing the mode distributions, it is believed that the transmission dips originate from the resonances of three kinds of EGPs modes respectively, including the symmetrical EGPs, anti-symmetrical EGPs, and EGPs of a semi-infinite sheet. By changing the width and length of the wing, the conclusion that transmission dips originate from EGPs modes is further approved. Thanks to the tunable permittivity of graphene by gate voltages, the transmittance dips can be easily tuned.