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Design of Tunable Terahertz Metamaterial Sensor with Single- and Dual-Resonance Characteristic
We present two types of refractive index sensors by using tunable terahertz (THz) metamaterial (TTM) based on two concentric split-ring resonators (SRRs) with different splits. By modifying the distance between SRRs and substrate, TTM shows tunable single- and dual-resonance characteristic. The maxi...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8471471/ https://www.ncbi.nlm.nih.gov/pubmed/34578528 http://dx.doi.org/10.3390/nano11092212 |
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author | Yang, Jiahao Lin, Yu-Sheng |
author_facet | Yang, Jiahao Lin, Yu-Sheng |
author_sort | Yang, Jiahao |
collection | PubMed |
description | We present two types of refractive index sensors by using tunable terahertz (THz) metamaterial (TTM) based on two concentric split-ring resonators (SRRs) with different splits. By modifying the distance between SRRs and substrate, TTM shows tunable single- and dual-resonance characteristic. The maximum tuning range of resonance is 0.432 THz from 0.958 THz to 1.390 THz. To demonstrate a great flexibility of TTM in real application, TTM device is exposed on the surrounding ambient with different refractive index (n). The sensitivity of TTM can be enhanced by increasing SRR height, which is increased from 0.18 THz/RIU to 1.12 THz/RIU under the condition of n = 1.1. These results provide a strategy to improve the sensing performance of the metamaterial-based sensing device by properly arranging the geometric position of meta-atoms. The proposed TTM device can be used for tunable filters, frequency-selective detectors, and tunable high-efficiency sensors in the THz frequency range. |
format | Online Article Text |
id | pubmed-8471471 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-84714712021-09-28 Design of Tunable Terahertz Metamaterial Sensor with Single- and Dual-Resonance Characteristic Yang, Jiahao Lin, Yu-Sheng Nanomaterials (Basel) Article We present two types of refractive index sensors by using tunable terahertz (THz) metamaterial (TTM) based on two concentric split-ring resonators (SRRs) with different splits. By modifying the distance between SRRs and substrate, TTM shows tunable single- and dual-resonance characteristic. The maximum tuning range of resonance is 0.432 THz from 0.958 THz to 1.390 THz. To demonstrate a great flexibility of TTM in real application, TTM device is exposed on the surrounding ambient with different refractive index (n). The sensitivity of TTM can be enhanced by increasing SRR height, which is increased from 0.18 THz/RIU to 1.12 THz/RIU under the condition of n = 1.1. These results provide a strategy to improve the sensing performance of the metamaterial-based sensing device by properly arranging the geometric position of meta-atoms. The proposed TTM device can be used for tunable filters, frequency-selective detectors, and tunable high-efficiency sensors in the THz frequency range. MDPI 2021-08-27 /pmc/articles/PMC8471471/ /pubmed/34578528 http://dx.doi.org/10.3390/nano11092212 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 Yang, Jiahao Lin, Yu-Sheng Design of Tunable Terahertz Metamaterial Sensor with Single- and Dual-Resonance Characteristic |
title | Design of Tunable Terahertz Metamaterial Sensor with Single- and Dual-Resonance Characteristic |
title_full | Design of Tunable Terahertz Metamaterial Sensor with Single- and Dual-Resonance Characteristic |
title_fullStr | Design of Tunable Terahertz Metamaterial Sensor with Single- and Dual-Resonance Characteristic |
title_full_unstemmed | Design of Tunable Terahertz Metamaterial Sensor with Single- and Dual-Resonance Characteristic |
title_short | Design of Tunable Terahertz Metamaterial Sensor with Single- and Dual-Resonance Characteristic |
title_sort | design of tunable terahertz metamaterial sensor with single- and dual-resonance characteristic |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8471471/ https://www.ncbi.nlm.nih.gov/pubmed/34578528 http://dx.doi.org/10.3390/nano11092212 |
work_keys_str_mv | AT yangjiahao designoftunableterahertzmetamaterialsensorwithsingleanddualresonancecharacteristic AT linyusheng designoftunableterahertzmetamaterialsensorwithsingleanddualresonancecharacteristic |