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Volume 13
Issue 8
10.3390/coatings13081340
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Communication

Ultrathin Narrowband and Bidirectional Perfect Metasurface Absorber

by
Bingzhen Li
,
Yuhua Chen
,
Qingqing Wu
,
Yan Li
,
Yaxing Wei
,
Jijun Wang
*,
Fangyuan Li
* and
Xinwei Liu
*
Institute of Defense Engineering, Academy of Military Science of the PLA, Beijing 100036, China
*
Authors to whom correspondence should be addressed.
Coatings 2023, 13(8), 1340; https://doi.org/10.3390/coatings13081340
Submission received: 11 July 2023 / Revised: 24 July 2023 / Accepted: 27 July 2023 / Published: 30 July 2023
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Abstract

The conventional design approaches for achieving perfect absorption of electromagnetic (EM) waves using metasurface absorbers (MSAs) are limited to absorbing waves in one direction while reflecting waves in the other. In this study, a novel ultrathin narrowband MSA with bidirectional perfect absorption properties has been proposed, based on a tri-layer metal square-circular-square patch (SCSP) structure. The simulation results demonstrate that the proposed MSA exhibits a remarkable absorbance of 98.1%, which is consistent with the experimental and theoretical calculations. The equivalent constitutive parameters that were retrieved, as well as the simulated surface current and the power loss density distributions, reveal that the perfect absorption of the designed MSA originates from the fundamental dipolar resonance. Furthermore, the proposed MSA demonstrates stable wide-angle absorption properties for both transverse electric (TE) and transverse magnetic (TM) waves under various oblique incidence angles. The absorption characteristics of the MSA can be fine-tuned by adjusting the structural parameters. Additionally, the proposed MSA boasts excellent ultrathin thickness, bidirectional, polarization-insensitive, and wide-angle properties, making it highly suitable for a range of potential applications such as imaging, detection, and sensing.
Keywords: metasurface absorber; microwave; bidirectional metasurface absorber; microwave; bidirectional

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MDPI and ACS Style

Li, B.; Chen, Y.; Wu, Q.; Li, Y.; Wei, Y.; Wang, J.; Li, F.; Liu, X. Ultrathin Narrowband and Bidirectional Perfect Metasurface Absorber. Coatings 2023, 13, 1340. https://doi.org/10.3390/coatings13081340

AMA Style

Li B, Chen Y, Wu Q, Li Y, Wei Y, Wang J, Li F, Liu X. Ultrathin Narrowband and Bidirectional Perfect Metasurface Absorber. Coatings. 2023; 13(8):1340. https://doi.org/10.3390/coatings13081340

Chicago/Turabian Style

Li, Bingzhen, Yuhua Chen, Qingqing Wu, Yan Li, Yaxing Wei, Jijun Wang, Fangyuan Li, and Xinwei Liu. 2023. "Ultrathin Narrowband and Bidirectional Perfect Metasurface Absorber" Coatings 13, no. 8: 1340. https://doi.org/10.3390/coatings13081340

APA Style

Li, B., Chen, Y., Wu, Q., Li, Y., Wei, Y., Wang, J., Li, F., & Liu, X. (2023). Ultrathin Narrowband and Bidirectional Perfect Metasurface Absorber. Coatings, 13(8), 1340. https://doi.org/10.3390/coatings13081340

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