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Active Electromagnetically Induced Transparency Effect in Graphene-Dielectric Hybrid Metamaterial and Its High-Performance Sensor Application

Electromagnetically induced transparency (EIT) based on dielectric metamaterials has attracted attentions in recent years because of its functional manipulation of electromagnetic waves and high refractive index sensitivity, such as high transmission, sharp phase change, and large group delay, etc....

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Detalles Bibliográficos
Autores principales: Gao, Fan, Yuan, Peicheng, Gao, Shaojun, Deng, Juan, Sun, Zhiyu, Jin, Guoli, Zeng, Guanglu, Yan, Bo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8400393/
https://www.ncbi.nlm.nih.gov/pubmed/34443863
http://dx.doi.org/10.3390/nano11082032
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author Gao, Fan
Yuan, Peicheng
Gao, Shaojun
Deng, Juan
Sun, Zhiyu
Jin, Guoli
Zeng, Guanglu
Yan, Bo
author_facet Gao, Fan
Yuan, Peicheng
Gao, Shaojun
Deng, Juan
Sun, Zhiyu
Jin, Guoli
Zeng, Guanglu
Yan, Bo
author_sort Gao, Fan
collection PubMed
description Electromagnetically induced transparency (EIT) based on dielectric metamaterials has attracted attentions in recent years because of its functional manipulation of electromagnetic waves and high refractive index sensitivity, such as high transmission, sharp phase change, and large group delay, etc. In this paper, an active controlled EIT effect based on a graphene-dielectric hybrid metamaterial is proposed in the near infrared region. By changing the Fermi level of the top-covered graphene, a dynamic EIT effect with a high quality factor (Q-factor) is realized, which exhibits a tunable, slow, light performance with a maximum group index of 2500. Another intriguing characteristic of the EIT effect is its high refractive index sensitivity. In the graphene-covered metamaterial, the refractive index sensitivity is simulated as high as 411 nm/RIU and the figure-of-merit (FOM) is up to 159, which outperforms the metastructure without graphene. Therefore, the proposed graphene-covered dielectric metamaterial presents an active EIT effect in the near infrared region, which highlights its great application potential in deep optical switching, tunable slow light devices, and sensitive refractive index sensors, etc.
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spelling pubmed-84003932021-08-29 Active Electromagnetically Induced Transparency Effect in Graphene-Dielectric Hybrid Metamaterial and Its High-Performance Sensor Application Gao, Fan Yuan, Peicheng Gao, Shaojun Deng, Juan Sun, Zhiyu Jin, Guoli Zeng, Guanglu Yan, Bo Nanomaterials (Basel) Article Electromagnetically induced transparency (EIT) based on dielectric metamaterials has attracted attentions in recent years because of its functional manipulation of electromagnetic waves and high refractive index sensitivity, such as high transmission, sharp phase change, and large group delay, etc. In this paper, an active controlled EIT effect based on a graphene-dielectric hybrid metamaterial is proposed in the near infrared region. By changing the Fermi level of the top-covered graphene, a dynamic EIT effect with a high quality factor (Q-factor) is realized, which exhibits a tunable, slow, light performance with a maximum group index of 2500. Another intriguing characteristic of the EIT effect is its high refractive index sensitivity. In the graphene-covered metamaterial, the refractive index sensitivity is simulated as high as 411 nm/RIU and the figure-of-merit (FOM) is up to 159, which outperforms the metastructure without graphene. Therefore, the proposed graphene-covered dielectric metamaterial presents an active EIT effect in the near infrared region, which highlights its great application potential in deep optical switching, tunable slow light devices, and sensitive refractive index sensors, etc. MDPI 2021-08-10 /pmc/articles/PMC8400393/ /pubmed/34443863 http://dx.doi.org/10.3390/nano11082032 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 Article
Gao, Fan
Yuan, Peicheng
Gao, Shaojun
Deng, Juan
Sun, Zhiyu
Jin, Guoli
Zeng, Guanglu
Yan, Bo
Active Electromagnetically Induced Transparency Effect in Graphene-Dielectric Hybrid Metamaterial and Its High-Performance Sensor Application
title Active Electromagnetically Induced Transparency Effect in Graphene-Dielectric Hybrid Metamaterial and Its High-Performance Sensor Application
title_full Active Electromagnetically Induced Transparency Effect in Graphene-Dielectric Hybrid Metamaterial and Its High-Performance Sensor Application
title_fullStr Active Electromagnetically Induced Transparency Effect in Graphene-Dielectric Hybrid Metamaterial and Its High-Performance Sensor Application
title_full_unstemmed Active Electromagnetically Induced Transparency Effect in Graphene-Dielectric Hybrid Metamaterial and Its High-Performance Sensor Application
title_short Active Electromagnetically Induced Transparency Effect in Graphene-Dielectric Hybrid Metamaterial and Its High-Performance Sensor Application
title_sort active electromagnetically induced transparency effect in graphene-dielectric hybrid metamaterial and its high-performance sensor application
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8400393/
https://www.ncbi.nlm.nih.gov/pubmed/34443863
http://dx.doi.org/10.3390/nano11082032
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