Cargando…

Actively Controllable Terahertz Metal–Graphene Metamaterial Based on Electromagnetically Induced Transparency Effect

A metal–graphene metamaterial device exhibiting a tunable, electromagnetically induced transparency (EIT) spectral response at terahertz frequencies is investigated. The metamaterial structure is composed of a strip and a ring resonator, which serve as the bright and dark mode to induce the EIT effe...

Descripción completa

Detalles Bibliográficos
Autores principales: Gao, Liang, Feng, Chao, Li, Yongfu, Chen, Xiaohan, Wang, Qingpu, Zhao, Xian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9609005/
https://www.ncbi.nlm.nih.gov/pubmed/36296861
http://dx.doi.org/10.3390/nano12203672
_version_ 1784818909150445568
author Gao, Liang
Feng, Chao
Li, Yongfu
Chen, Xiaohan
Wang, Qingpu
Zhao, Xian
author_facet Gao, Liang
Feng, Chao
Li, Yongfu
Chen, Xiaohan
Wang, Qingpu
Zhao, Xian
author_sort Gao, Liang
collection PubMed
description A metal–graphene metamaterial device exhibiting a tunable, electromagnetically induced transparency (EIT) spectral response at terahertz frequencies is investigated. The metamaterial structure is composed of a strip and a ring resonator, which serve as the bright and dark mode to induce the EIT effect. By employing the variable conductivity of graphene to dampen the dark resonator, the response frequency of the device shifts dynamically over 100 GHz, which satisfies the convenient post-fabrication tunability requirement. The slow-light behavior of the proposed device is also analyzed with the maximum group delay of 1.2 ps. The sensing performance is lastly studied and the sensitivity can reach up to 100 GHz/(RIU), with a figure of merit (FOM) value exceeding 4 [Formula: see text]. Therefore, the graphene-based metamaterial provides a new miniaturized platform to facilitate the development of terahertz modulators, sensors, and slow-light applications.
format Online
Article
Text
id pubmed-9609005
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-96090052022-10-28 Actively Controllable Terahertz Metal–Graphene Metamaterial Based on Electromagnetically Induced Transparency Effect Gao, Liang Feng, Chao Li, Yongfu Chen, Xiaohan Wang, Qingpu Zhao, Xian Nanomaterials (Basel) Article A metal–graphene metamaterial device exhibiting a tunable, electromagnetically induced transparency (EIT) spectral response at terahertz frequencies is investigated. The metamaterial structure is composed of a strip and a ring resonator, which serve as the bright and dark mode to induce the EIT effect. By employing the variable conductivity of graphene to dampen the dark resonator, the response frequency of the device shifts dynamically over 100 GHz, which satisfies the convenient post-fabrication tunability requirement. The slow-light behavior of the proposed device is also analyzed with the maximum group delay of 1.2 ps. The sensing performance is lastly studied and the sensitivity can reach up to 100 GHz/(RIU), with a figure of merit (FOM) value exceeding 4 [Formula: see text]. Therefore, the graphene-based metamaterial provides a new miniaturized platform to facilitate the development of terahertz modulators, sensors, and slow-light applications. MDPI 2022-10-19 /pmc/articles/PMC9609005/ /pubmed/36296861 http://dx.doi.org/10.3390/nano12203672 Text en © 2022 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, Liang
Feng, Chao
Li, Yongfu
Chen, Xiaohan
Wang, Qingpu
Zhao, Xian
Actively Controllable Terahertz Metal–Graphene Metamaterial Based on Electromagnetically Induced Transparency Effect
title Actively Controllable Terahertz Metal–Graphene Metamaterial Based on Electromagnetically Induced Transparency Effect
title_full Actively Controllable Terahertz Metal–Graphene Metamaterial Based on Electromagnetically Induced Transparency Effect
title_fullStr Actively Controllable Terahertz Metal–Graphene Metamaterial Based on Electromagnetically Induced Transparency Effect
title_full_unstemmed Actively Controllable Terahertz Metal–Graphene Metamaterial Based on Electromagnetically Induced Transparency Effect
title_short Actively Controllable Terahertz Metal–Graphene Metamaterial Based on Electromagnetically Induced Transparency Effect
title_sort actively controllable terahertz metal–graphene metamaterial based on electromagnetically induced transparency effect
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9609005/
https://www.ncbi.nlm.nih.gov/pubmed/36296861
http://dx.doi.org/10.3390/nano12203672
work_keys_str_mv AT gaoliang activelycontrollableterahertzmetalgraphenemetamaterialbasedonelectromagneticallyinducedtransparencyeffect
AT fengchao activelycontrollableterahertzmetalgraphenemetamaterialbasedonelectromagneticallyinducedtransparencyeffect
AT liyongfu activelycontrollableterahertzmetalgraphenemetamaterialbasedonelectromagneticallyinducedtransparencyeffect
AT chenxiaohan activelycontrollableterahertzmetalgraphenemetamaterialbasedonelectromagneticallyinducedtransparencyeffect
AT wangqingpu activelycontrollableterahertzmetalgraphenemetamaterialbasedonelectromagneticallyinducedtransparencyeffect
AT zhaoxian activelycontrollableterahertzmetalgraphenemetamaterialbasedonelectromagneticallyinducedtransparencyeffect