Triple plasmon-induced transparency and outstanding slow-light in quasi-continuous monolayer graphene structure

作者：CuiXiu Xiong,Hui Xu,MingZhuo Zhao,BaiHui Zhang,Chao Liu,Biao Zeng,Kuan Wu,BanXian Ruan,Min Li,HongJian Li

摘要：We propose a simple quasi-continuous monolayer graphene structure and achieve a dynamically tunable triple plasmon-induced transparency(PIT)effect in the proposed structure.Additional analyses indicate that the proposed structure contains a selfconstructed bright-dark-dark mode system.A uniform theoretical model is introduced to investigate the spectral response characteristics and slow light-effects in the proposed system,and the theoretical and the simulated results exhibit high consistency.In addition,the influences of the Fermi level and the carrier mobility of graphene on transmission spectra are discussed.It is found that each PIT window exhibits an independent dynamical adjustability owing to the quasi-continuity of the proposed structure.Finally,the slow-light effects are investigated based on the calculation of the group refractive index and phase shift.It is found that the structure displays excellent slow-light effects near the PIT windows with high-group indices,and the maximum group index of each PIT window exceeds 1000 when the carrier mobility of graphene increases to 3.5 m^2 V^-1s^-1.The proposed structure has potential to be used in multichannel filters,optical switches,modulators,and slow-light devices.Additionally,the established theoretical model lays a theoretical basis for research on multimode coupling effects.

发文机构：School of Physics and Electronics All-solid-state Energy Storage Materials and Devices Key Laboratory of Hunan Province School of Mathematics and Statistics

关键词：monolayergraphenestructureplasmon-inducedtransparencyslowlight

分类号： TP3[自动化与计算机技术—计算机科学与技术]