Terahertz Broadband Absorber Based on a Combined Circular Disc Structure

To solve the problem of complex structure and narrow absorption band of most of today′s terahertz absorbers, this paper proposes and utilizes the finite element (COMSOL) method to numerically simulate a broadband absorber based on a straightforward periodic structure consisting of a disk and concent...

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Autores principales:	Meihong Huang, Kaihua Wei, Pinghui Wu, Danyang Xu, Yan Xu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	terahertz perfect absorption broadband ring-disk structure polarization insensitive Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/41a54f8f48ab4699ac6d102ce6d9298c
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spelling	oai:doaj.org-article:41a54f8f48ab4699ac6d102ce6d9298c2021-11-25T18:22:52ZTerahertz Broadband Absorber Based on a Combined Circular Disc Structure10.3390/mi121112902072-666Xhttps://doaj.org/article/41a54f8f48ab4699ac6d102ce6d9298c2021-10-01T00:00:00Zhttps://www.mdpi.com/2072-666X/12/11/1290https://doaj.org/toc/2072-666XTo solve the problem of complex structure and narrow absorption band of most of today′s terahertz absorbers, this paper proposes and utilizes the finite element (COMSOL) method to numerically simulate a broadband absorber based on a straightforward periodic structure consisting of a disk and concentric ring. The final results show that our designed absorber has an absorption rate of over 99% in the broadband range of 9.06 THz to 9.8 THz and an average of over 97.7% in the ultra-broadband range of 8.62 THz to 10 THz. The reason for the high absorption is explained by the depiction of the electric field on the absorber surface at different frequencies. In addition, the materials for the top pattern of the absorber are replaced by Cu, Ag, or Al, and the absorber still achieves perfect absorption with different metal materials. Due to the perfect symmetry of the absorber structure, the absorber is very polarization-insensitive. The overall design is simple, easy to process and production. Therefore, our research will offer great potential for applications in areas such as terahertz electromagnetic stealth, sensing, and thermal imaging.Meihong HuangKaihua WeiPinghui WuDanyang XuYan XuMDPI AGarticleterahertzperfect absorptionbroadbandring-disk structurepolarization insensitiveMechanical engineering and machineryTJ1-1570ENMicromachines, Vol 12, Iss 1290, p 1290 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	terahertz perfect absorption broadband ring-disk structure polarization insensitive Mechanical engineering and machinery TJ1-1570
spellingShingle	terahertz perfect absorption broadband ring-disk structure polarization insensitive Mechanical engineering and machinery TJ1-1570 Meihong Huang Kaihua Wei Pinghui Wu Danyang Xu Yan Xu Terahertz Broadband Absorber Based on a Combined Circular Disc Structure
description	To solve the problem of complex structure and narrow absorption band of most of today′s terahertz absorbers, this paper proposes and utilizes the finite element (COMSOL) method to numerically simulate a broadband absorber based on a straightforward periodic structure consisting of a disk and concentric ring. The final results show that our designed absorber has an absorption rate of over 99% in the broadband range of 9.06 THz to 9.8 THz and an average of over 97.7% in the ultra-broadband range of 8.62 THz to 10 THz. The reason for the high absorption is explained by the depiction of the electric field on the absorber surface at different frequencies. In addition, the materials for the top pattern of the absorber are replaced by Cu, Ag, or Al, and the absorber still achieves perfect absorption with different metal materials. Due to the perfect symmetry of the absorber structure, the absorber is very polarization-insensitive. The overall design is simple, easy to process and production. Therefore, our research will offer great potential for applications in areas such as terahertz electromagnetic stealth, sensing, and thermal imaging.
format	article
author	Meihong Huang Kaihua Wei Pinghui Wu Danyang Xu Yan Xu
author_facet	Meihong Huang Kaihua Wei Pinghui Wu Danyang Xu Yan Xu
author_sort	Meihong Huang
title	Terahertz Broadband Absorber Based on a Combined Circular Disc Structure
title_short	Terahertz Broadband Absorber Based on a Combined Circular Disc Structure
title_full	Terahertz Broadband Absorber Based on a Combined Circular Disc Structure
title_fullStr	Terahertz Broadband Absorber Based on a Combined Circular Disc Structure
title_full_unstemmed	Terahertz Broadband Absorber Based on a Combined Circular Disc Structure
title_sort	terahertz broadband absorber based on a combined circular disc structure
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/41a54f8f48ab4699ac6d102ce6d9298c
work_keys_str_mv	AT meihonghuang terahertzbroadbandabsorberbasedonacombinedcirculardiscstructure AT kaihuawei terahertzbroadbandabsorberbasedonacombinedcirculardiscstructure AT pinghuiwu terahertzbroadbandabsorberbasedonacombinedcirculardiscstructure AT danyangxu terahertzbroadbandabsorberbasedonacombinedcirculardiscstructure AT yanxu terahertzbroadbandabsorberbasedonacombinedcirculardiscstructure
_version_	1718411251058475008

Terahertz Broadband Absorber Based on a Combined Circular Disc Structure

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