Frequency tunable switching between transmission and absorption modes based on graphene and VO2 layers at the THz range

被引：3

作者：

Roumi, Bita ^{[1
]}

Abdi-Ghaleh, Reza ^{[1
]}

Jing, Liqiao ^{[2
]}

机构：

[1] Univ Bonab, Dept Laser & Opt Engn, Bonab, Iran

[2] Zhejiang Univ, Interdisciplinary Ctr Quantum Informat, ZJU Hangzhou Global Sci & Technol Innovat Ctr, State Key Lab Extreme Photon & Instrumentat, Hangzhou 310027, Peoples R China

来源：

PHYSICA SCRIPTA | 2024年 / 99卷 / 01期

关键词：

switching; graphene; vanadium dioxide; THz range; TERAHERTZ; ABSORBER;

D O I：

10.1088/1402-4896/ad14dc

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper, a tunable multilayer structure is proposed, which can provide reversible switching between transmission and absorption modes at the terahertz region without reconfiguration. The layered structure consists of graphene, Si, and VO2 layers. Transfer matrix method is employed to describe the optical properties of the layered structure. The switching phenomenon occurs based on the VO2 transition from insulator to metal phase by varying temperature. Furthermore, active frequency tuning by graphene chemical potential for thermally switching transmission and absorption with near-perfect intensity is observed. Incidence angular stability for TE and TM is up to 20(degrees) and 40(degrees), respectively. Finally, the Si layer thickness effect demonstrates that mainly defines the peak number and frequency for both functions. Theoretical implementation confirms the potential usefulness of the proposed configuration in applications such as reversibly tunable smart absorbers, filters, or thermo-optical switches for high-speed optical systems.

引用

页数：11