Plasmonic opals

Observation of a collective molecular exciton mode beyond the strong coupling

Pierre Fauché, Christian Gebhardt, Maxim Sukharev, Renaud A.L. Vallée

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Achieving and controlling strong light-matter interactions in many-body systems is of paramount importance both for fundamental understanding and potential applications. In this paper we demonstrate both experimentally and theoretically how to manipulate strong coupling between the Bragg-plasmon mode supported by an organo-metallic array and molecular excitons in the form of J-aggregates dispersed on the hybrid structure. We observe experimentally the transition from a conventional strong coupling regime exhibiting the usual upper and lower polaritonic branches to a more complex regime, where a third nondispersive mode is seen, as the concentration of J-aggregates is increased. The numerical simulations confirm the presence of the third resonance. We attribute its physical nature to collective molecule-molecule interactions leading to a collective electromagnetic response. A simple analytical model is proposed to explain the physics of the third mode. The nonlinear dependence on molecular parameters followed from the model are confirmed in a set of rigorous numerical studies. It is shown that at the energy of the collective mode molecules oscillate completely out of phase with the incident radiation acting as an effictive thin metal layer.

Original languageEnglish (US)
Article number4107
JournalScientific Reports
Volume7
Issue number1
DOIs
StatePublished - Dec 1 2017
Externally publishedYes

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excitons
molecules
hybrid structures
incident radiation
interactions
electromagnetism
physics
metals
simulation
energy

ASJC Scopus subject areas

  • General

Cite this

Plasmonic opals : Observation of a collective molecular exciton mode beyond the strong coupling. / Fauché, Pierre; Gebhardt, Christian; Sukharev, Maxim; Vallée, Renaud A.L.

In: Scientific Reports, Vol. 7, No. 1, 4107, 01.12.2017.

Research output: Contribution to journalArticle

Fauché, Pierre ; Gebhardt, Christian ; Sukharev, Maxim ; Vallée, Renaud A.L. / Plasmonic opals : Observation of a collective molecular exciton mode beyond the strong coupling. In: Scientific Reports. 2017 ; Vol. 7, No. 1.
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