Affiliation:
1. School of Science, East China Jiaotong University, Nanchang 330013, China
Abstract
This study introduces a single-layer patterned graphene metamaterial, composed of a graphene ring (GR), two parallel graphene strips (TPGSs), two vertical graphene strips (TVGSs), and a graphene block (GB), which achieves triple plasmon-induced transparency (TPIT) in the terahertz (THz) frequency range using coupled mode theory (CMT) and the finite-difference time-domain (FDTD) technique. Moreover, a synchronized electro-optical switch with four modulation modes is implemented by dynamically adjusting graphene’s Fermi level, exhibiting modulation degrees of amplitude (MDA) of 88.3%, 94.7%, 86.9%, and 89.0% at 1.69[Formula: see text]THz, 3.14[Formula: see text]THz, 3.95[Formula: see text]THz, and 4.67[Formula: see text]THz, respectively. In addition, the modes excited by TPGSs and TVGSs interconvert due to the proposed structure’s symmetry, accounting for the polarization insensitivity of TPIT. The enhanced MDA and polarization insensitivity of the electro-optical switch presented in this study significantly surpass those of comparable electro-optical switches. As a result, the polarization insensitivity of multiple optical switches to incident light fields offers a promising approach for designing optoelectronic devices.
Funder
Natural Science Foundation of China
Natural Science Foundation of Jiangxi Province
Science and technology project of Jiangxi Provincial Department of Education
Publisher
World Scientific Pub Co Pte Ltd
Subject
Condensed Matter Physics,Statistical and Nonlinear Physics