Collective Plasmonic-Molecular Modes in the Strong Coupling Regime

Abstract

We demonstrate strong coupling between molecular excited states and surface plasmon modes of a slit array in a thin metal film. The coupling manifests itself as an anti-crossing behavior of the two newly formed polaritons. As the coupling strength grows, a new mode emerges, which is attributed to long range molecular interactions mediated by the plasmonic field. The new, molecular-like mode repels the polariton states, and leads to an opening of energy gaps both below and above the asymptotic free molecule energy.

8 pages, 6 figures, submitted to PRL

References in corpus (1)

• Ultra strong coupling regime and plasmon-polaritons in parabolic semiconductor quantum wells

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