Open AccessDynamically tunable dual plasmon-induced transparency and absorption based on a single-layer patterned graphene metamaterial
Author(s) -
Enduo Gao,
Zhimin Liu,
Hongjian Li,
Hui Xu,
Zhenbin Zhang,
Xin Luo,
Cuixiu Xiong,
Chao Liu,
Baihui Zhang,
Fengqi Zhao
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.013884
Subject(s) - plasmon , graphene , finite difference time domain method , materials science , metamaterial , optoelectronics , absorption (acoustics) , optics , refractive index , surface plasmon , electric field , electromagnetically induced transparency , nanotechnology , physics , quantum mechanics , composite material
Dual plasmon-induced transparency (PIT) and plasmon-induced absorption (PIA) are simultaneously achieved in an integrated metamaterial composed of single layer of graphene. Electric field distribution and coupled mode theory (CMT) are used to demonstrate the physical mechanism of dual PIT and PIA, and the theoretical result of CMT is highly consistent with the finite-difference time-domain (FDTD) method simulation result. Further research shows that both the dual PIT and PIA phenomenon can be effectively modulated by the Fermi level, the carrier mobility of the graphene and the refractive index of the surrounding environment. It is meaningful that the absorption of the dual PIA spectrum can be abruptly increased to 93.5% when the carrier mobility of graphene is 0.8m 2 /Vs. In addition, the group index can be as high as 328. Thus, our work can pave new way for developing excellent slow-light and light absorption functional devices.