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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
摘要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. © The Author(s).
DOI10.1186/s11671-018-2535-0
发表期刊Nanoscale Research Letters
ISSN19317573
卷号13
收录类别EI
语种英语
EISSN1556276X