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Electromagnetic Field Redistribution in Metal Nanoparticle on Graphene
Li,Keke1,3; Liu,Anping1; Wei,Dapeng2; Yu,Keke1,3; Sun,Xiaonan1; Yan,Sheng4; Huang,Yingzhou3
2018-04-25
摘要AbstractBenefiting 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.
关键词EM redistribution Graphene plasmons Nanoparticle/graphene hybrid system SERS
DOI10.1186/s11671-018-2535-0
发表期刊Nanoscale Research Letters
ISSN1931-7573
卷号13期号:1
收录类别SCI
WOS记录号BMC:10.1186/s11671-018-2535-0
语种英语