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Microcavity-integrated graphene waveguide: a reconfigurable electro-optical attenuator and switch
Graphene has been widely utilized in optoelectronic applications due to its high carrier mobility, and extremely fast optical response. Microcavity-integrated graphene waveguide structure is one basic module of integrated photonic devices which can greatly improve the light-matter interaction streng...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6102207/ https://www.ncbi.nlm.nih.gov/pubmed/30127385 http://dx.doi.org/10.1038/s41598-018-30396-8 |
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author | Sui, Guorong Wu, Jun Zhang, Yuehua Yin, Chenhui Gao, Xiumin |
author_facet | Sui, Guorong Wu, Jun Zhang, Yuehua Yin, Chenhui Gao, Xiumin |
author_sort | Sui, Guorong |
collection | PubMed |
description | Graphene has been widely utilized in optoelectronic applications due to its high carrier mobility, and extremely fast optical response. Microcavity-integrated graphene waveguide structure is one basic module of integrated photonic devices which can greatly improve the light-matter interaction strength. The enhanced optical absorption in the undoped graphene layer results from the light trapping and the corresponding long light-graphene interaction length. Tuning the Fermi energy level of the graphene layer enables the electro-optical modulation. We report the realization of reconfigurable electro-optical attenuator and switch with unity-order modulation depth in light reflection and transmission at near-infrared frequency. The transformation from a lossy absorber to a quasi-perfect transparent condition of the monolayer graphene by tuning the Fermi level leads to the unity-order tunability of the electro-optical attenuator and switch. We investigate theoretically and numerically the absorption properties of the designed microcavity-integrated graphene with respect to different graphene Fermi levels. Electro-optical attenuator with attenuating coefficient from 10% to 98.29% is fulfilled. On-off electro-optical switching with a switching contrast larger than 21 dB is demonstrated. Our approach provides the possibilities of graphene photonics applied in communications, and sensing. |
format | Online Article Text |
id | pubmed-6102207 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-61022072018-08-27 Microcavity-integrated graphene waveguide: a reconfigurable electro-optical attenuator and switch Sui, Guorong Wu, Jun Zhang, Yuehua Yin, Chenhui Gao, Xiumin Sci Rep Article Graphene has been widely utilized in optoelectronic applications due to its high carrier mobility, and extremely fast optical response. Microcavity-integrated graphene waveguide structure is one basic module of integrated photonic devices which can greatly improve the light-matter interaction strength. The enhanced optical absorption in the undoped graphene layer results from the light trapping and the corresponding long light-graphene interaction length. Tuning the Fermi energy level of the graphene layer enables the electro-optical modulation. We report the realization of reconfigurable electro-optical attenuator and switch with unity-order modulation depth in light reflection and transmission at near-infrared frequency. The transformation from a lossy absorber to a quasi-perfect transparent condition of the monolayer graphene by tuning the Fermi level leads to the unity-order tunability of the electro-optical attenuator and switch. We investigate theoretically and numerically the absorption properties of the designed microcavity-integrated graphene with respect to different graphene Fermi levels. Electro-optical attenuator with attenuating coefficient from 10% to 98.29% is fulfilled. On-off electro-optical switching with a switching contrast larger than 21 dB is demonstrated. Our approach provides the possibilities of graphene photonics applied in communications, and sensing. Nature Publishing Group UK 2018-08-20 /pmc/articles/PMC6102207/ /pubmed/30127385 http://dx.doi.org/10.1038/s41598-018-30396-8 Text en © The Author(s) 2018 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 Sui, Guorong Wu, Jun Zhang, Yuehua Yin, Chenhui Gao, Xiumin Microcavity-integrated graphene waveguide: a reconfigurable electro-optical attenuator and switch |
title | Microcavity-integrated graphene waveguide: a reconfigurable electro-optical attenuator and switch |
title_full | Microcavity-integrated graphene waveguide: a reconfigurable electro-optical attenuator and switch |
title_fullStr | Microcavity-integrated graphene waveguide: a reconfigurable electro-optical attenuator and switch |
title_full_unstemmed | Microcavity-integrated graphene waveguide: a reconfigurable electro-optical attenuator and switch |
title_short | Microcavity-integrated graphene waveguide: a reconfigurable electro-optical attenuator and switch |
title_sort | microcavity-integrated graphene waveguide: a reconfigurable electro-optical attenuator and switch |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6102207/ https://www.ncbi.nlm.nih.gov/pubmed/30127385 http://dx.doi.org/10.1038/s41598-018-30396-8 |
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