Applied Physics B

, Volume 113, Issue 4, pp 519–525 | Cite as

A Kirchhoff solution to plasmon hybridization

Article

Abstract

Using Ohm’s law, a solution to plasmon hybridization via Kirchoff’s equations results in a simple and intuitive picture of a metal nanoparticle dimer as a capacitively coupled circuit. Calculated absorption spectra and surface charge densities show that dimers of different metallic composition support different super- and sub-radiant plasmons compared to homodimers. Strong screening of Coulomb interactions between nanoparticles of different metallic background prohibits the excitation of anti-bonding plasmons, while changes to the free electron conductivity upon a collective response result in coupled plasmon lifetimes which shift as a function of interparticle distance. Smaller separations then result in the longest lived plasmons.

Keywords

Plasmon Mode Couple Plasmon Bonding Mode Plasmon Energy Plasmon Hybridization 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

This work was supported by the Robert A. Welch Foundation (C-1664) and the National Science Foundation (CHE-0955286). The authors would like to thank Peter Nordlander for fruitful discussions.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Department of Chemistry, Laboratory for NanophotonicsRice UniversityHoustonUSA
  2. 2.Department of Electrical and Computer Engineering, Laboratory for NanophotonicsRice UniversityHoustonUSA

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