A graphene-assisted all-pass filter for a tunable terahertz transmissive modulator with near-perfect absorption

We proposed an all-pass filter based perfect absorber scheme which also can function as a highly efficient transmissive modulator. We theoretically analyzed the proposed scheme using the temporal coupled mode theory and showed that near-perfect absorption could be achieved with practically modest de...

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Autores principales: Tran, Thang Q., Lee, Sangjun, Kim, Sangin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6715740/
https://www.ncbi.nlm.nih.gov/pubmed/31467385
http://dx.doi.org/10.1038/s41598-019-49066-4
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author Tran, Thang Q.
Lee, Sangjun
Kim, Sangin
author_facet Tran, Thang Q.
Lee, Sangjun
Kim, Sangin
author_sort Tran, Thang Q.
collection PubMed
description We proposed an all-pass filter based perfect absorber scheme which also can function as a highly efficient transmissive modulator. We theoretically analyzed the proposed scheme using the temporal coupled mode theory and showed that near-perfect absorption could be achieved with practically modest deviation from the critical coupling condition. We also demonstrated the feasibility of the proposed scheme in a grating-based all-pass filter device with a variable loss implemented by two separate graphene layers, achieving an absorption of ~99.8% and a transmission modulation depth of ~70 dB in a terahertz frequency range. We also numerically investigated the tunability of the designed device.
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spelling pubmed-67157402019-09-13 A graphene-assisted all-pass filter for a tunable terahertz transmissive modulator with near-perfect absorption Tran, Thang Q. Lee, Sangjun Kim, Sangin Sci Rep Article We proposed an all-pass filter based perfect absorber scheme which also can function as a highly efficient transmissive modulator. We theoretically analyzed the proposed scheme using the temporal coupled mode theory and showed that near-perfect absorption could be achieved with practically modest deviation from the critical coupling condition. We also demonstrated the feasibility of the proposed scheme in a grating-based all-pass filter device with a variable loss implemented by two separate graphene layers, achieving an absorption of ~99.8% and a transmission modulation depth of ~70 dB in a terahertz frequency range. We also numerically investigated the tunability of the designed device. Nature Publishing Group UK 2019-08-29 /pmc/articles/PMC6715740/ /pubmed/31467385 http://dx.doi.org/10.1038/s41598-019-49066-4 Text en © The Author(s) 2019 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Tran, Thang Q.
Lee, Sangjun
Kim, Sangin
A graphene-assisted all-pass filter for a tunable terahertz transmissive modulator with near-perfect absorption
title A graphene-assisted all-pass filter for a tunable terahertz transmissive modulator with near-perfect absorption
title_full A graphene-assisted all-pass filter for a tunable terahertz transmissive modulator with near-perfect absorption
title_fullStr A graphene-assisted all-pass filter for a tunable terahertz transmissive modulator with near-perfect absorption
title_full_unstemmed A graphene-assisted all-pass filter for a tunable terahertz transmissive modulator with near-perfect absorption
title_short A graphene-assisted all-pass filter for a tunable terahertz transmissive modulator with near-perfect absorption
title_sort graphene-assisted all-pass filter for a tunable terahertz transmissive modulator with near-perfect absorption
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6715740/
https://www.ncbi.nlm.nih.gov/pubmed/31467385
http://dx.doi.org/10.1038/s41598-019-49066-4
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