Strong tunable absorption enhancement in graphene using dielectric-metal core-shell resonators

Abstract We theoretically investigate light absorption by a graphene monolayer that is coated on the outside of dielectric-metal core-shell resonators (DMCSRs). We demonstrate that light absorption of graphene can be greatly enhanced in such multi-layered core-shell architectures as a result of the...

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Autores principales:	Mingjie Wan, Yan Li, Jiawei Chen, Wenyang Wu, Zhuo Chen, Zhenlin Wang, Huitian Wang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/cb1cfab96dce4093854b69807af5f299
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spelling	oai:doaj.org-article:cb1cfab96dce4093854b69807af5f2992021-12-02T12:30:52ZStrong tunable absorption enhancement in graphene using dielectric-metal core-shell resonators10.1038/s41598-017-00056-42045-2322https://doaj.org/article/cb1cfab96dce4093854b69807af5f2992017-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00056-4https://doaj.org/toc/2045-2322Abstract We theoretically investigate light absorption by a graphene monolayer that is coated on the outside of dielectric-metal core-shell resonators (DMCSRs). We demonstrate that light absorption of graphene can be greatly enhanced in such multi-layered core-shell architectures as a result of the excitation of the hybridized bonding plasmon resonance supported by the DMCSRs. We also demonstrate that the absorption enhancement in graphene can be easily tuned over a wide range from the visible to the near-infrared, and particularly the enhancement factor can be optimally maximized at any selective wavelength, by simultaneously varying the dielectric core size and the metal shell thickness. Our results suggest that the graphene-wrapped DMCSRs with strong and highly wavelength-tunable absorption enhancement in graphene could be attractive candidates for applications in graphene-based photodetectors and image sensors.Mingjie WanYan LiJiawei ChenWenyang WuZhuo ChenZhenlin WangHuitian WangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mingjie Wan Yan Li Jiawei Chen Wenyang Wu Zhuo Chen Zhenlin Wang Huitian Wang Strong tunable absorption enhancement in graphene using dielectric-metal core-shell resonators
description	Abstract We theoretically investigate light absorption by a graphene monolayer that is coated on the outside of dielectric-metal core-shell resonators (DMCSRs). We demonstrate that light absorption of graphene can be greatly enhanced in such multi-layered core-shell architectures as a result of the excitation of the hybridized bonding plasmon resonance supported by the DMCSRs. We also demonstrate that the absorption enhancement in graphene can be easily tuned over a wide range from the visible to the near-infrared, and particularly the enhancement factor can be optimally maximized at any selective wavelength, by simultaneously varying the dielectric core size and the metal shell thickness. Our results suggest that the graphene-wrapped DMCSRs with strong and highly wavelength-tunable absorption enhancement in graphene could be attractive candidates for applications in graphene-based photodetectors and image sensors.
format	article
author	Mingjie Wan Yan Li Jiawei Chen Wenyang Wu Zhuo Chen Zhenlin Wang Huitian Wang
author_facet	Mingjie Wan Yan Li Jiawei Chen Wenyang Wu Zhuo Chen Zhenlin Wang Huitian Wang
author_sort	Mingjie Wan
title	Strong tunable absorption enhancement in graphene using dielectric-metal core-shell resonators
title_short	Strong tunable absorption enhancement in graphene using dielectric-metal core-shell resonators
title_full	Strong tunable absorption enhancement in graphene using dielectric-metal core-shell resonators
title_fullStr	Strong tunable absorption enhancement in graphene using dielectric-metal core-shell resonators
title_full_unstemmed	Strong tunable absorption enhancement in graphene using dielectric-metal core-shell resonators
title_sort	strong tunable absorption enhancement in graphene using dielectric-metal core-shell resonators
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/cb1cfab96dce4093854b69807af5f299
work_keys_str_mv	AT mingjiewan strongtunableabsorptionenhancementingrapheneusingdielectricmetalcoreshellresonators AT yanli strongtunableabsorptionenhancementingrapheneusingdielectricmetalcoreshellresonators AT jiaweichen strongtunableabsorptionenhancementingrapheneusingdielectricmetalcoreshellresonators AT wenyangwu strongtunableabsorptionenhancementingrapheneusingdielectricmetalcoreshellresonators AT zhuochen strongtunableabsorptionenhancementingrapheneusingdielectricmetalcoreshellresonators AT zhenlinwang strongtunableabsorptionenhancementingrapheneusingdielectricmetalcoreshellresonators AT huitianwang strongtunableabsorptionenhancementingrapheneusingdielectricmetalcoreshellresonators
_version_	1718394305775665152

Strong tunable absorption enhancement in graphene using dielectric-metal core-shell resonators

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