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Design and modeling of a planar graphene structure as a terahertz cyclotron radiation source

With incredibly high carrier mobility and saturation velocity, graphene would be an ideal candidate for a miniaturized solid-state cyclotron radiation source. A planar semicircular graphene arc geometry was investigated for emission in the 0.5–1.5 THz range. Analytical studies, confirmed by finite e...

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Autores principales: Planillo, Jordan, Alves, Fabio
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8342439/
https://www.ncbi.nlm.nih.gov/pubmed/34354196
http://dx.doi.org/10.1038/s41598-021-95502-9
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author Planillo, Jordan
Alves, Fabio
author_facet Planillo, Jordan
Alves, Fabio
author_sort Planillo, Jordan
collection PubMed
description With incredibly high carrier mobility and saturation velocity, graphene would be an ideal candidate for a miniaturized solid-state cyclotron radiation source. A planar semicircular graphene arc geometry was investigated for emission in the 0.5–1.5 THz range. Analytical studies, confirmed by finite element simulations, show that the emitted THz frequencies are inversely proportional to the arc radius given a fixed charge-carrier velocity. The simulations show that the desired frequency spectrum can be obtained with design radii ranging from 50 to 150 nm. Interestingly, the radiated spectrum is independent of the frequency of the stimulation of the graphene nano-arcs. The simulations also indicate that the total output power correlates well with the Larmor formulation. The device is expected to emit 1 nW/cm(2), which confirms the findings of existing research in this field. Such a design could yield a scalable and cost-effective THz source.
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spelling pubmed-83424392021-08-06 Design and modeling of a planar graphene structure as a terahertz cyclotron radiation source Planillo, Jordan Alves, Fabio Sci Rep Article With incredibly high carrier mobility and saturation velocity, graphene would be an ideal candidate for a miniaturized solid-state cyclotron radiation source. A planar semicircular graphene arc geometry was investigated for emission in the 0.5–1.5 THz range. Analytical studies, confirmed by finite element simulations, show that the emitted THz frequencies are inversely proportional to the arc radius given a fixed charge-carrier velocity. The simulations show that the desired frequency spectrum can be obtained with design radii ranging from 50 to 150 nm. Interestingly, the radiated spectrum is independent of the frequency of the stimulation of the graphene nano-arcs. The simulations also indicate that the total output power correlates well with the Larmor formulation. The device is expected to emit 1 nW/cm(2), which confirms the findings of existing research in this field. Such a design could yield a scalable and cost-effective THz source. Nature Publishing Group UK 2021-08-05 /pmc/articles/PMC8342439/ /pubmed/34354196 http://dx.doi.org/10.1038/s41598-021-95502-9 Text en © This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Planillo, Jordan
Alves, Fabio
Design and modeling of a planar graphene structure as a terahertz cyclotron radiation source
title Design and modeling of a planar graphene structure as a terahertz cyclotron radiation source
title_full Design and modeling of a planar graphene structure as a terahertz cyclotron radiation source
title_fullStr Design and modeling of a planar graphene structure as a terahertz cyclotron radiation source
title_full_unstemmed Design and modeling of a planar graphene structure as a terahertz cyclotron radiation source
title_short Design and modeling of a planar graphene structure as a terahertz cyclotron radiation source
title_sort design and modeling of a planar graphene structure as a terahertz cyclotron radiation source
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8342439/
https://www.ncbi.nlm.nih.gov/pubmed/34354196
http://dx.doi.org/10.1038/s41598-021-95502-9
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