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Low Voltage Graphene-Based Amplitude Modulator for High Efficiency Terahertz Modulation
In this paper, a high-efficiency terahertz amplitude modulation device based on a field-effect transistor has been proposed. The polarization insensitive modulator is designed to achieve a maximum experimental modulation depth of about 53% within 5 V of gate voltages using monolayer graphene. Moreov...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7153508/ https://www.ncbi.nlm.nih.gov/pubmed/32210123 http://dx.doi.org/10.3390/nano10030585 |
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author | Zheng, Qianying Xia, Liangping Tang, Linlong Du, Chunlei Cui, Hongliang |
author_facet | Zheng, Qianying Xia, Liangping Tang, Linlong Du, Chunlei Cui, Hongliang |
author_sort | Zheng, Qianying |
collection | PubMed |
description | In this paper, a high-efficiency terahertz amplitude modulation device based on a field-effect transistor has been proposed. The polarization insensitive modulator is designed to achieve a maximum experimental modulation depth of about 53% within 5 V of gate voltages using monolayer graphene. Moreover, the manufacturing processes are inexpensive. Two methods are adopted to improve modulation performance. For one thing, the metal metamaterial designed can effectively enhance the electromagnetic field near single-layer graphene and therefore greatly promote the graphene’s modulation ability in terahertz. For another, polyethylene oxide-based electrolytes (PEO:LiClO(4)) acts as a high-capacity donor, which makes it possible to dope single-layer graphene at a relatively low voltage. |
format | Online Article Text |
id | pubmed-7153508 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-71535082020-04-20 Low Voltage Graphene-Based Amplitude Modulator for High Efficiency Terahertz Modulation Zheng, Qianying Xia, Liangping Tang, Linlong Du, Chunlei Cui, Hongliang Nanomaterials (Basel) Article In this paper, a high-efficiency terahertz amplitude modulation device based on a field-effect transistor has been proposed. The polarization insensitive modulator is designed to achieve a maximum experimental modulation depth of about 53% within 5 V of gate voltages using monolayer graphene. Moreover, the manufacturing processes are inexpensive. Two methods are adopted to improve modulation performance. For one thing, the metal metamaterial designed can effectively enhance the electromagnetic field near single-layer graphene and therefore greatly promote the graphene’s modulation ability in terahertz. For another, polyethylene oxide-based electrolytes (PEO:LiClO(4)) acts as a high-capacity donor, which makes it possible to dope single-layer graphene at a relatively low voltage. MDPI 2020-03-23 /pmc/articles/PMC7153508/ /pubmed/32210123 http://dx.doi.org/10.3390/nano10030585 Text en © 2020 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 Zheng, Qianying Xia, Liangping Tang, Linlong Du, Chunlei Cui, Hongliang Low Voltage Graphene-Based Amplitude Modulator for High Efficiency Terahertz Modulation |
title | Low Voltage Graphene-Based Amplitude Modulator for High Efficiency Terahertz Modulation |
title_full | Low Voltage Graphene-Based Amplitude Modulator for High Efficiency Terahertz Modulation |
title_fullStr | Low Voltage Graphene-Based Amplitude Modulator for High Efficiency Terahertz Modulation |
title_full_unstemmed | Low Voltage Graphene-Based Amplitude Modulator for High Efficiency Terahertz Modulation |
title_short | Low Voltage Graphene-Based Amplitude Modulator for High Efficiency Terahertz Modulation |
title_sort | low voltage graphene-based amplitude modulator for high efficiency terahertz modulation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7153508/ https://www.ncbi.nlm.nih.gov/pubmed/32210123 http://dx.doi.org/10.3390/nano10030585 |
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