Plexcitonic nanoparticles: plasmon-exciton coupling in nanoshell-J-aggregate complexes

Nano Lett. 2008 Oct;8(10):3481-7. doi: 10.1021/nl8024278. Epub 2008 Aug 26.


Stable Au nanoshell-J-aggregate complexes are formed that exhibit coherent coupling between the localized plasmons of a nanoshell and the excitons of molecular J-aggregates adsorbed on its surface. By tuning the nanoshell plasmon energies across the exciton line of the J-aggregate, plasmon-exciton coupling energies for these complexes are obtained. The strength of this interaction is dependent on the specific plasmon mode of the nanoparticle coupled to the J-aggregate exciton. From a model based on Gans theory, we obtain an expression for the plasmon-exciton hybridized states of the complex.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adsorption
  • Coloring Agents / pharmacology
  • Crystallization
  • Electromagnetic Fields
  • Gold / chemistry
  • Hydrogen-Ion Concentration
  • Metal Nanoparticles / chemistry*
  • Models, Statistical
  • Nanoparticles / chemistry*
  • Nanotechnology / methods*
  • Photons
  • Spectrum Analysis, Raman / methods
  • Surface Plasmon Resonance
  • Surface Properties


  • Coloring Agents
  • Gold