Plasmon hybridization in nanoshell dimers

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...

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Bibliographic Details
Published in:The Journal of chemical physics 2005-07, Vol.123 (2), p.024701-024701-11
Main Authors: Brandl, Daniel W., Oubre, Chris, Nordlander, Peter
Format: Article
Language:English
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Summary: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.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.1949169