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Electromagnetic Field Redistribution in Metal Nanoparticle on Graphene.


ABSTRACT: Benefiting from the induced image charge on metal film, the light energy is confined on a film surface under metal nanoparticle dimer, which is called electromagnetic field redistribution. In this work, electromagnetic field distribution of metal nanoparticle monomer or dimer on graphene is investigated through finite-difference time-domain method. The results point out that the electromagnetic field (EM) redistribution occurs in this nanoparticle/graphene hybrid system at infrared region where light energy could also be confined on a monolayer graphene surface. Surface charge distribution was analyzed using finite element analysis, and surface-enhanced Raman spectrum (SERS) was utilized to verify this phenomenon. Furthermore, the data about dielectric nanoparticle on monolayer graphene demonstrate this EM redistribution is attributed to strong coupling between light-excited surface charge on monolayer graphene and graphene plasmon-induced image charge on dielectric nanoparticle surface. Our work extends the knowledge of monolayer graphene plasmon, which has a wide range of applications in monolayer graphene-related film.

SUBMITTER: Li K 

PROVIDER: S-EPMC5918144 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature

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Electromagnetic Field Redistribution in Metal Nanoparticle on Graphene.

Li Keke K   Liu Anping A   Wei Dapeng D   Yu Keke K   Sun Xiaonan X   Yan Sheng S   Huang Yingzhou Y  

Nanoscale research letters 20180425 1


Benefiting from the induced image charge on metal film, the light energy is confined on a film surface under metal nanoparticle dimer, which is called electromagnetic field redistribution. In this work, electromagnetic field distribution of metal nanoparticle monomer or dimer on graphene is investigated through finite-difference time-domain method. The results point out that the electromagnetic field (EM) redistribution occurs in this nanoparticle/graphene hybrid system at infrared region where  ...[more]

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