Resonant surface plasmons of a metal nanosphere treated as propagating surface plasmons  

作　　者：Yu-Rui Fang Xiao-Rui Tian 方蔚瑞;田小锐(Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics,Dalian University of Technology;Bionanophotonics, Department of Applied Physics, Chalmers University of Technology;Division of Physics and Applied Physics, School of Physical and Mathematical Sciences,Nanyang Technological University)

机构地区：[1]Key Laboratory of Materials Modification by Laser, Electron, and Ion Beams （Ministry of Education）, School of Physics, Dalian University of Technology, Dalian 116024, China [2]Bionanophotonics, Department of Applied Physics, Chalmers University of Technology, SE-412 96, Goteborg, Sweden [3]Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore

出　　处：《Chinese Physics B》2018年第6期406-409,共4页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11704058);the Fundamental Research Funds for the Central Universities,China(Grant No.DUT16RC(3)111)

摘　　要：On the assumption that the resonant surface plasmons on a spherical nanoparticle are formed by standing waves of two counter-propagating surface plasmon waves along the surface, by using Mie theory simulation, we find that the dispersions of surface plasmon resonant modes supported by silver nanospheres match with those of the surface plasmons on a semiinfinite medium-silver interface very well. This suggests that the resonant surface plasmons of a metal nanosphere can be treated as a propagating surface plasmon wave.On the assumption that the resonant surface plasmons on a spherical nanoparticle are formed by standing waves of two counter-propagating surface plasmon waves along the surface, by using Mie theory simulation, we find that the dispersions of surface plasmon resonant modes supported by silver nanospheres match with those of the surface plasmons on a semiinfinite medium-silver interface very well. This suggests that the resonant surface plasmons of a metal nanosphere can be treated as a propagating surface plasmon wave.

关 键 词：surface plasmons surface waves scattering of particles dispersion relations 

分 类 号：O4[理学—物理]