Plasmon hybridization in nanoshell dimers

被引:97
作者
Brandl, DW [1 ]
Oubre, C [1 ]
Nordlander, P [1 ]
机构
[1] Rice Univ, Rice Quantum Inst, Dept Phys & Astron, Houston, TX 77251 USA
基金
美国国家科学基金会;
关键词
D O I
10.1063/1.1949169
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
We extend the plasmon hybridization method to investigate the plasmon modes of metallic nanoshell dimers. The formalism is also generalized to include the effects of dielectric backgrounds. It is shown that the presence of dielectrics shifts the plasmon resonances of the individual nanoparticles to lower energies and screens their interaction in the dimer configuration. The net result is a redshift of dimer energies compared to the system without dielectrics and a weaker dependence of the dimer plasmon energies on dimer separation. We calculate the plasmon energies and optical absorption of nanoshell dimers as a function of dimer separation. The results are in excellent agreement with the results of finite difference time domain simulations. (c) 2005 American Institute of Physics.
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页数:11
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