Electromagnetic Field Redistribution in Metal Nanoparticle on Graphene.
Electromagnetic Field Redistribution in Metal Nanoparticle on Graphene.
复制标题
石墨烯上金属纳米粒子的电磁场重新分布
DOI:
10.1186/s11671-018-2535-0
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发表时间:
2018-04-25
影响因子:
--
通讯作者:
Huang Y
中科院分区:
文献类型:
--
作者:
Li K;Liu A;Wei D;Yu K;Sun X;Yan S;Huang Y
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.
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