Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Switchable broadband metamaterial absorber/reflector based on vanadium dioxide rings

Not Accessible

Your library or personal account may give you access

Abstract

A new broadband tunable metamaterial absorber based on different radii of vanadium dioxide (${\rm VO}_2$) rings loaded on the dielectric layer is designed. According to the insulator-to-metal phase transition characteristics of ${\rm VO}_2$ under thermal excitation, the dynamic adjustment of the absorption by the external temperature is achieved. The simulation results demonstrate that when ${\rm VO}_2$ is in its metal phase at high temperature, an absorption greater than 90% in the bandwidth range of 2.64–7 THz can be obtained and its relative bandwidth is reached to 90.5%. However, the absorption rate in the same frequency range is always lower than 2.3% when ${\rm VO}_2$ is in the insulator phase at low temperature, which means that the absorber can be used as a perfect reflector. The maximum tunable range of the proposed absorber can be realized from below 2.3% to nearly 100%. We further analyze and discuss the equivalent impedance and electric field distribution of the absorber and clarify the adjustment mechanism of the absorption performance of the ${\rm VO}_2$ ring. In addition, a multireflection interference theory is also investigated to quantitatively explain the physical absorption mechanism. Such a tunable broadband absorber based on temperature control has great potential to be applied to sensors, thermophotovoltaics, and wireless communication.

© 2020 Optical Society of America

Full Article  |  PDF Article
More Like This
Broadband tunable terahertz metamaterial absorber having near-perfect absorbance modulation capability based on a patterned vanadium dioxide circular patch

Qian Zhao, Xuefeng Qin, Chongyang Xu, Haiquan Zhou, and Ben-Xin Wang
Appl. Opt. 62(35) 9283-9290 (2023)

Dynamically tunable broadband absorber/reflector based on graphene and VO2 metamaterials

Xinyi Wang, Chi Ma, Lihua Xiao, Xia Li, Jiabin Yu, and Binggang Xiao
Appl. Opt. 61(7) 1646-1651 (2022)

Dual-regulated broadband terahertz absorber based on vanadium dioxide and graphene

Chunyu Zhang, Heng Zhang, Fang Ling, and Bin Zhang
Appl. Opt. 60(16) 4835-4840 (2021)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (7)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (4)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved