Open AccessTriple plasmon-induced transparency and optical switch desensitized to polarized light based on a mono-layer metamaterial
Author(s) -
Zhimin Liu,
Xiao Zhang,
Fengqi Zhao,
Xin Luo,
Zhenbin Zhang,
Yipeng Qin,
Shanshan Zhuo,
Enduo Gao,
Hongjian Li,
Zao Yi
Publication year - 2021
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.425315
Subject(s) - metamaterial , optics , finite difference time domain method , slow light , electromagnetically induced transparency , plasmon , terahertz radiation , polarization (electrochemistry) , ray , optoelectronics , circular polarization , materials science , optical switch , physics , photonic crystal , microstrip , chemistry
A mono-layer metamaterial comprising four graphene-strips and one graphene-square-ring is proposed herein to realize triple plasmon-induced transparency (PIT). Theoretical results based on the coupled mode theory (CMT) are in agreement with the simulation results obtained using the finite-difference time-domain (FDTD). An optical switch is investigated based on the characteristics of graphene dynamic modulation, with modulation degrees of the amplitude of 90.1%, 80.1%, 94.5%, and 84.7% corresponding to 1.905 THz, 2.455 THz, 3.131 THz, and 4.923 THz, respectively. Moreover, the proposed metamaterial is insensitive to the change in the angle of polarized light, for which the triple-PIT is equivalent in the cases of both x- and y-polarized light. The optical switch based on the proposed structure is effective not only for the linearly polarized light in different directions but also for left circularly polarized and right circularly polarized light. As such, this work provides insight into the design of optoelectronic devices based on the polarization characteristics of the incident light field on the optical switch and PIT.