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Simple Design of a Tunable Quadruple-Broadband Terahertz Metamaterial Absorber Based on VO2

Tunable multi-broadband terahertz (THz) metamaterial absorbers (MAs) can effectively act as THz amplitude modulators, which are the essential components for the future THz communication systems. Till now, various tunable multi-broadband THz MAs including tunable dual-broadband and triple-broadband absorbers have been investigated. However, there are few researches on tunable quadruple-broadband THz MAs. In this work, a simple design of tunable quadruple-broadband THz MA based on VO2 is proposed. The proposed absorber possesses four broad absorption bands with absorptivity over 90% in frequency ranges of 0.54-2.30 THz, 3.67-5.33 THz, 6.72-8.4 THz and 9.72-11.47 THz, and the corresponding absorption bandwidths reach 1.76 THz, 1.66 THz, 1.68 THz and 1.75 THz, respectively. Moreover, we can dynamically control the absorptivity of four absorption bands by varying VO2 conductivity. Thus, the proposed absorber possesses the modulation depths of 79.15%, 49.71%, 33.03% and 21.98% at 1.48 THz, 4.46 THz, 7.45 THz and 10.44 THz, respectively. The physical origin of quadruple-broadband perfect absorption is revealed with aid of electric field distributions at resonant frequencies. We also investigate the effects of incidence angle and polarization angle on the quadruple-broadband perfect absorption. The proposed absorber has broad application prospects in THz imaging, modulating, detecting and sensing owing to its excellent absorption characteristics.

Terahertz, Metamaterial, Quadruple, Tunable, Vanadium Dioxide, Bandwidth

APA Style

Ri, K., Pak, D., Ri, C. (2023). Simple Design of a Tunable Quadruple-Broadband Terahertz Metamaterial Absorber Based on VO2. Advances in Materials, 12(4), 45-52.

ACS Style

Ri, K.; Pak, D.; Ri, C. Simple Design of a Tunable Quadruple-Broadband Terahertz Metamaterial Absorber Based on VO2. Adv. Mater. 2023, 12(4), 45-52. doi: 10.11648/

AMA Style

Ri K, Pak D, Ri C. Simple Design of a Tunable Quadruple-Broadband Terahertz Metamaterial Absorber Based on VO2. Adv Mater. 2023;12(4):45-52. doi: 10.11648/

Copyright © 2023 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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