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Refractive Index-Based Terahertz Sensor Using Graphene for Material Characterization

In this paper, a graphene-based THz metamaterial has been designed and characterized for use in sensing various refractive index profiles. The proposed single-band THz sensor was constructed using a graphene-metal hybridized periodic metamaterial wherein the unit cell had a footprint of 1.395λ(eff)...

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Autores principales: Veeraselvam, Aruna, Mohammed, Gulam Nabi Alsath, Savarimuthu, Kirubaveni, Anguera, Jaume, Paul, Jessica Constance, Krishnan, Ram Kumar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8662438/
https://www.ncbi.nlm.nih.gov/pubmed/34884151
http://dx.doi.org/10.3390/s21238151
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author Veeraselvam, Aruna
Mohammed, Gulam Nabi Alsath
Savarimuthu, Kirubaveni
Anguera, Jaume
Paul, Jessica Constance
Krishnan, Ram Kumar
author_facet Veeraselvam, Aruna
Mohammed, Gulam Nabi Alsath
Savarimuthu, Kirubaveni
Anguera, Jaume
Paul, Jessica Constance
Krishnan, Ram Kumar
author_sort Veeraselvam, Aruna
collection PubMed
description In this paper, a graphene-based THz metamaterial has been designed and characterized for use in sensing various refractive index profiles. The proposed single-band THz sensor was constructed using a graphene-metal hybridized periodic metamaterial wherein the unit cell had a footprint of 1.395λ(eff) × 1.395λ(eff) and resonated at 4.4754 THz. The realized peak absorption was 98.88% at 4.4754 THz. The sensitivity of the proposed metamaterial sensor was estimated using the absorption characteristics of the unit cell. The performance of the sensor was analyzed under two different categories, viz. the random dielectric loading and chemical analytes, based on the refractive index. The proposed THz sensor offered a peak sensitivity of 22.75 GHz/Refractive Index Unit (RIU) for the various sample loadings. In addition, the effect of the sample thickness on the sensor performance was analyzed and the results were presented. From the results, it can be inferred that the proposed metamaterial THz sensor that was based on a refractive index is suitable for THz sensing applications.
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spelling pubmed-86624382021-12-11 Refractive Index-Based Terahertz Sensor Using Graphene for Material Characterization Veeraselvam, Aruna Mohammed, Gulam Nabi Alsath Savarimuthu, Kirubaveni Anguera, Jaume Paul, Jessica Constance Krishnan, Ram Kumar Sensors (Basel) Communication In this paper, a graphene-based THz metamaterial has been designed and characterized for use in sensing various refractive index profiles. The proposed single-band THz sensor was constructed using a graphene-metal hybridized periodic metamaterial wherein the unit cell had a footprint of 1.395λ(eff) × 1.395λ(eff) and resonated at 4.4754 THz. The realized peak absorption was 98.88% at 4.4754 THz. The sensitivity of the proposed metamaterial sensor was estimated using the absorption characteristics of the unit cell. The performance of the sensor was analyzed under two different categories, viz. the random dielectric loading and chemical analytes, based on the refractive index. The proposed THz sensor offered a peak sensitivity of 22.75 GHz/Refractive Index Unit (RIU) for the various sample loadings. In addition, the effect of the sample thickness on the sensor performance was analyzed and the results were presented. From the results, it can be inferred that the proposed metamaterial THz sensor that was based on a refractive index is suitable for THz sensing applications. MDPI 2021-12-06 /pmc/articles/PMC8662438/ /pubmed/34884151 http://dx.doi.org/10.3390/s21238151 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Communication
Veeraselvam, Aruna
Mohammed, Gulam Nabi Alsath
Savarimuthu, Kirubaveni
Anguera, Jaume
Paul, Jessica Constance
Krishnan, Ram Kumar
Refractive Index-Based Terahertz Sensor Using Graphene for Material Characterization
title Refractive Index-Based Terahertz Sensor Using Graphene for Material Characterization
title_full Refractive Index-Based Terahertz Sensor Using Graphene for Material Characterization
title_fullStr Refractive Index-Based Terahertz Sensor Using Graphene for Material Characterization
title_full_unstemmed Refractive Index-Based Terahertz Sensor Using Graphene for Material Characterization
title_short Refractive Index-Based Terahertz Sensor Using Graphene for Material Characterization
title_sort refractive index-based terahertz sensor using graphene for material characterization
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8662438/
https://www.ncbi.nlm.nih.gov/pubmed/34884151
http://dx.doi.org/10.3390/s21238151
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