Radiation damping in metal nanoparticle pairs

被引:145
作者
Dahmen, Christian [1 ]
Schmidt, Benjamin [1 ]
von Plessen, Gero [1 ]
机构
[1] Rhein Westfal TH Aachen, Inst Phys, IA, D-52056 Aachen, Germany
关键词
D O I
10.1021/nl062377u
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The radiation damping rate of plasmon resonances in pairs of spherical gold nanoparticles is calculated. The radiative line width of the plasmon resonance indicates significant far-field coupling between the nanoparticles over distances many times the particle diameter. The radiation damping of the coupled particle-plasmon mode alternates between superradiant and subradiant behavior when the particle spacing is varied. At small particle spacings where near-field coupling occurs, the radiation damping rate lies far below that of an isolated particle.
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页码:318 / 322
页数:5
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