Transition to strong coupling regime in hybrid plasmonic systems: exciton-induced transparency and Fano interference

We present a microscopic model describing the transition to a strong coupling regime for an emitter resonantly coupled to a surface plasmon in a metal–dielectric structure. We demonstrate that the shape of scattering spectra is determined by an interplay of two distinct mechanisms. First is the near...

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Bibliographic Details
Published inNanophotonics (Berlin, Germany) Vol. 10; no. 14; pp. 3735 - 3744
Main Author Shahbazyan, Tigran V.
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 28.10.2021
Walter de Gruyter GmbH
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Summary:We present a microscopic model describing the transition to a strong coupling regime for an emitter resonantly coupled to a surface plasmon in a metal–dielectric structure. We demonstrate that the shape of scattering spectra is determined by an interplay of two distinct mechanisms. First is the near-field coupling between the emitter and the plasmon mode which underpins energy exchange between the system components and gives rise to exciton-induced transparency minimum in scattering spectra prior to the transition to a strong coupling regime. The second mechanism is the Fano interference between the plasmon dipole and the plasmon-induced emitter’s dipole as the system interacts with the radiation field. We show that the Fano interference can strongly affect the overall shape of scattering spectra, leading to the inversion of spectral asymmetry that was recently reported in the experiment.
ISSN:2192-8614
2192-8606
2192-8614
DOI:10.1515/nanoph-2021-0246