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Graphene Plasmon Resonances for Electrically-Tunable Sub-Femtometer Dimensional Resolution

A coupled graphene structure (CGS) is proposed to obtain an electrically tunable sub-femtometer (sub-fm) dimensional resolution. According to analytical and numerical investigations, the CGS can support two branches of localized surface plasmon resonances (LSPRs), which park at the dielectric spacer...

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Autores principales: Wu, Zhiyong, Zhang, Lei, Zhang, Min, Li, Irene Ling, Su, Hong, Zhao, Huancheng, Ruan, Shuangchen, Liang, Huawei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7407765/
https://www.ncbi.nlm.nih.gov/pubmed/32679818
http://dx.doi.org/10.3390/nano10071381
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author Wu, Zhiyong
Zhang, Lei
Zhang, Min
Li, Irene Ling
Su, Hong
Zhao, Huancheng
Ruan, Shuangchen
Liang, Huawei
author_facet Wu, Zhiyong
Zhang, Lei
Zhang, Min
Li, Irene Ling
Su, Hong
Zhao, Huancheng
Ruan, Shuangchen
Liang, Huawei
author_sort Wu, Zhiyong
collection PubMed
description A coupled graphene structure (CGS) is proposed to obtain an electrically tunable sub-femtometer (sub-fm) dimensional resolution. According to analytical and numerical investigations, the CGS can support two branches of localized surface plasmon resonances (LSPRs), which park at the dielectric spacer between two pieces of graphene. The coupled efficiencies of the odd-order modes are even four orders of magnitude higher than that of the even-order modes. In particular, a sub-fm resolution for detecting the change in the spacer thickness can be reached using the lowest order LSPR mode. The LSPR wavelength and the dimensional differential resolution can be electrically-tuned from 9.5 to 33 μm and from 4.3 to 15 nm/pm, respectively, by modifying the chemical potential of the graphene via the gate voltage. Furthermore, by replacing the graphene ribbon (GR) at the top of the CGS with multiple GRs of different widths, a resonant frequency comb in the absorption spectrum with a tunable frequency interval is generated, which can be used to detect the changes in spacer thicknesses at different locations with sub-fm resolution.
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spelling pubmed-74077652020-08-12 Graphene Plasmon Resonances for Electrically-Tunable Sub-Femtometer Dimensional Resolution Wu, Zhiyong Zhang, Lei Zhang, Min Li, Irene Ling Su, Hong Zhao, Huancheng Ruan, Shuangchen Liang, Huawei Nanomaterials (Basel) Article A coupled graphene structure (CGS) is proposed to obtain an electrically tunable sub-femtometer (sub-fm) dimensional resolution. According to analytical and numerical investigations, the CGS can support two branches of localized surface plasmon resonances (LSPRs), which park at the dielectric spacer between two pieces of graphene. The coupled efficiencies of the odd-order modes are even four orders of magnitude higher than that of the even-order modes. In particular, a sub-fm resolution for detecting the change in the spacer thickness can be reached using the lowest order LSPR mode. The LSPR wavelength and the dimensional differential resolution can be electrically-tuned from 9.5 to 33 μm and from 4.3 to 15 nm/pm, respectively, by modifying the chemical potential of the graphene via the gate voltage. Furthermore, by replacing the graphene ribbon (GR) at the top of the CGS with multiple GRs of different widths, a resonant frequency comb in the absorption spectrum with a tunable frequency interval is generated, which can be used to detect the changes in spacer thicknesses at different locations with sub-fm resolution. MDPI 2020-07-15 /pmc/articles/PMC7407765/ /pubmed/32679818 http://dx.doi.org/10.3390/nano10071381 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
Wu, Zhiyong
Zhang, Lei
Zhang, Min
Li, Irene Ling
Su, Hong
Zhao, Huancheng
Ruan, Shuangchen
Liang, Huawei
Graphene Plasmon Resonances for Electrically-Tunable Sub-Femtometer Dimensional Resolution
title Graphene Plasmon Resonances for Electrically-Tunable Sub-Femtometer Dimensional Resolution
title_full Graphene Plasmon Resonances for Electrically-Tunable Sub-Femtometer Dimensional Resolution
title_fullStr Graphene Plasmon Resonances for Electrically-Tunable Sub-Femtometer Dimensional Resolution
title_full_unstemmed Graphene Plasmon Resonances for Electrically-Tunable Sub-Femtometer Dimensional Resolution
title_short Graphene Plasmon Resonances for Electrically-Tunable Sub-Femtometer Dimensional Resolution
title_sort graphene plasmon resonances for electrically-tunable sub-femtometer dimensional resolution
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7407765/
https://www.ncbi.nlm.nih.gov/pubmed/32679818
http://dx.doi.org/10.3390/nano10071381
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