Plexcitonic nanoparticles: plasmon-exciton coupling in nanoshell-J-aggregate complexes
Nche T Fofang, Tae-Ho Park, Oara Neumann, Nikolay A Mirin, Peter Nordlander, Naomi J Halas
Nano Letters 2008, 8 (10): 3481-7
18729410
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.
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