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Tunable angle-independent refractive index sensor based on Fano resonance in integrated metal and graphene nanoribbons

We propose a novel mechanism to construct a tunable and ultracompact refractive index sensor by using the Fano resonance in metal-graphene hybrid nanostructure. Plasmon modes in graphene nanoribbons and waveguide resonance modes in the slits of metal strip array coexist in this system. Strong interf...

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Detalles Bibliográficos
Autores principales: Pan, Meiyan, Liang, Zhaoxing, Wang, Yu, Chen, Yihang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4954990/
https://www.ncbi.nlm.nih.gov/pubmed/27439964
http://dx.doi.org/10.1038/srep29984
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author Pan, Meiyan
Liang, Zhaoxing
Wang, Yu
Chen, Yihang
author_facet Pan, Meiyan
Liang, Zhaoxing
Wang, Yu
Chen, Yihang
author_sort Pan, Meiyan
collection PubMed
description We propose a novel mechanism to construct a tunable and ultracompact refractive index sensor by using the Fano resonance in metal-graphene hybrid nanostructure. Plasmon modes in graphene nanoribbons and waveguide resonance modes in the slits of metal strip array coexist in this system. Strong interference between the two different modes occurs when they are spectrally overlapped, resulting in a Fano-type asymmetrically spectral lineshape which can be used for detecting the variations of ambient refractive index. The proposed sensor has a relatively high figure of merit (FOM) over 20 and its sensing performance shows a good tolerance to roughness. In addition to the wide range measurement enabled by the electrical tuning of graphene plasmon modes, such ultracompact system also provides an angle-independent operation and therefore, it can efficiently work for the detection of gas, liquid, or solids. Such optical nanostructure may also be applied to diverse fields such as temperature/pressure metering, medical detection, and mechanical precision measurement.
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spelling pubmed-49549902016-07-26 Tunable angle-independent refractive index sensor based on Fano resonance in integrated metal and graphene nanoribbons Pan, Meiyan Liang, Zhaoxing Wang, Yu Chen, Yihang Sci Rep Article We propose a novel mechanism to construct a tunable and ultracompact refractive index sensor by using the Fano resonance in metal-graphene hybrid nanostructure. Plasmon modes in graphene nanoribbons and waveguide resonance modes in the slits of metal strip array coexist in this system. Strong interference between the two different modes occurs when they are spectrally overlapped, resulting in a Fano-type asymmetrically spectral lineshape which can be used for detecting the variations of ambient refractive index. The proposed sensor has a relatively high figure of merit (FOM) over 20 and its sensing performance shows a good tolerance to roughness. In addition to the wide range measurement enabled by the electrical tuning of graphene plasmon modes, such ultracompact system also provides an angle-independent operation and therefore, it can efficiently work for the detection of gas, liquid, or solids. Such optical nanostructure may also be applied to diverse fields such as temperature/pressure metering, medical detection, and mechanical precision measurement. Nature Publishing Group 2016-07-21 /pmc/articles/PMC4954990/ /pubmed/27439964 http://dx.doi.org/10.1038/srep29984 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Pan, Meiyan
Liang, Zhaoxing
Wang, Yu
Chen, Yihang
Tunable angle-independent refractive index sensor based on Fano resonance in integrated metal and graphene nanoribbons
title Tunable angle-independent refractive index sensor based on Fano resonance in integrated metal and graphene nanoribbons
title_full Tunable angle-independent refractive index sensor based on Fano resonance in integrated metal and graphene nanoribbons
title_fullStr Tunable angle-independent refractive index sensor based on Fano resonance in integrated metal and graphene nanoribbons
title_full_unstemmed Tunable angle-independent refractive index sensor based on Fano resonance in integrated metal and graphene nanoribbons
title_short Tunable angle-independent refractive index sensor based on Fano resonance in integrated metal and graphene nanoribbons
title_sort tunable angle-independent refractive index sensor based on fano resonance in integrated metal and graphene nanoribbons
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4954990/
https://www.ncbi.nlm.nih.gov/pubmed/27439964
http://dx.doi.org/10.1038/srep29984
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