A Switchable Ultra-Wideband Metamaterial Absorber with Polarization-Insensitivity and Wide-incident Angle at THz Band

Liansheng Wang; Dongyan Xia; Quanhong Fu; Xueyong Ding; Yuan Wang

doi:10.3389/fmats.2021.729495

Frontiers in Materials (Jul 2021)

A Switchable Ultra-Wideband Metamaterial Absorber with Polarization-Insensitivity and Wide-incident Angle at THz Band

Liansheng Wang,
Dongyan Xia,
Quanhong Fu,
Xueyong Ding,
Yuan Wang

Affiliations

Liansheng Wang: Science and Technology Department, Sanya University, Sanya, China
Dongyan Xia: Finance and Economics Department, Sanya University, Sanya, China
Quanhong Fu: Science Department, Northwestern Polytechnical University Xi’an, Shanxi, China
Xueyong Ding: Science and Technology Department, Sanya University, Sanya, China
Yuan Wang: Science and Technology Department, Sanya University, Sanya, China

DOI: https://doi.org/10.3389/fmats.2021.729495
Journal volume & issue: Vol. 8

Abstract

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In this paper, we report a switchable ultra-wideband metamaterial absorber with polarization-insensitivity and wide-incident angle at THz band which is composed of VO2 disk, polyimide dielectric substrate, and gold ground plane. The results show that the absorption is greater than 90% from 3.5–8 THz for a temperature of 300 K and this absorption band disappears when the temperature rises to 350 K. The absorption property of our proposed metamaterial absorber is insensitive to polarization states and angles and it can withhold high absorption of more than 80% for wide-incident angles, up to 60° for TE mode and TM mode. The wideband absorption mechanism is elucidated using an effective medium and surface current analysis.

Published in Frontiers in Materials

ISSN: 2296-8016 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Technology
Website: https://www.frontiersin.org/journals/materials

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