A Simple and Efficient Method for Designing Broadband Terahertz Absorber Based on Singular Graphene Metasurface

In this paper, we propose a simple and efficient method for designing a broadband terahertz (THz) absorber based on singular graphene patches metasurface and metal-backed dielectric layer. An accurate circuit model of graphene patches is used for obtaining analytical expressions for the input impeda...

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Detalles Bibliográficos
Autores principales: Liu, Zhongmin, Guo, Liang, Zhang, Qingmao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6836235/
https://www.ncbi.nlm.nih.gov/pubmed/31547082
http://dx.doi.org/10.3390/nano9101351
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author Liu, Zhongmin
Guo, Liang
Zhang, Qingmao
author_facet Liu, Zhongmin
Guo, Liang
Zhang, Qingmao
author_sort Liu, Zhongmin
collection PubMed
description In this paper, we propose a simple and efficient method for designing a broadband terahertz (THz) absorber based on singular graphene patches metasurface and metal-backed dielectric layer. An accurate circuit model of graphene patches is used for obtaining analytical expressions for the input impedance of the proposed absorber. The input impedance is designed to be closely matched to the free space in a wide frequency range. Numerical simulation and analytical circuit model results consistently show that graphene metasurface-based THz absorber with an absorption value above 90% in a relative bandwidth of 100% has been achieved.
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spelling pubmed-68362352019-11-25 A Simple and Efficient Method for Designing Broadband Terahertz Absorber Based on Singular Graphene Metasurface Liu, Zhongmin Guo, Liang Zhang, Qingmao Nanomaterials (Basel) Article In this paper, we propose a simple and efficient method for designing a broadband terahertz (THz) absorber based on singular graphene patches metasurface and metal-backed dielectric layer. An accurate circuit model of graphene patches is used for obtaining analytical expressions for the input impedance of the proposed absorber. The input impedance is designed to be closely matched to the free space in a wide frequency range. Numerical simulation and analytical circuit model results consistently show that graphene metasurface-based THz absorber with an absorption value above 90% in a relative bandwidth of 100% has been achieved. MDPI 2019-09-20 /pmc/articles/PMC6836235/ /pubmed/31547082 http://dx.doi.org/10.3390/nano9101351 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Liu, Zhongmin
Guo, Liang
Zhang, Qingmao
A Simple and Efficient Method for Designing Broadband Terahertz Absorber Based on Singular Graphene Metasurface
title A Simple and Efficient Method for Designing Broadband Terahertz Absorber Based on Singular Graphene Metasurface
title_full A Simple and Efficient Method for Designing Broadband Terahertz Absorber Based on Singular Graphene Metasurface
title_fullStr A Simple and Efficient Method for Designing Broadband Terahertz Absorber Based on Singular Graphene Metasurface
title_full_unstemmed A Simple and Efficient Method for Designing Broadband Terahertz Absorber Based on Singular Graphene Metasurface
title_short A Simple and Efficient Method for Designing Broadband Terahertz Absorber Based on Singular Graphene Metasurface
title_sort simple and efficient method for designing broadband terahertz absorber based on singular graphene metasurface
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6836235/
https://www.ncbi.nlm.nih.gov/pubmed/31547082
http://dx.doi.org/10.3390/nano9101351
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