Generation of Anti-Stokes Fluorescence in a Strongly Coupled Organic Semiconductor Microcavity

Kyriacos Georgiou, Rahul Jayaprakash, Alexis Askitopoulos, David M. Coles, Pavlos G. Lagoudakis, David G. Lidzey

    Research output: Contribution to journalArticlepeer-review

    17 Citations (Scopus)

    Abstract

    We explore the generation of anti-Stokes fluorescence from strongly coupled organic dye microcavities following resonant ground-state excitation. We observe polariton emission along the lower polariton branch, with our results indicating that this process involves a return to the exciton reservoir and the absorption of thermal energy from molecules in a vibrationally excited ground-state. We speculate that the generation of a population of "hot" polaritons is enhanced by the fact that the cavity suppresses the emission of Stokes-shifted fluorescence, as it is energetically located below the cutoff frequency of the cavity.

    Original languageEnglish
    Pages (from-to)4343-4351
    Number of pages9
    JournalACS Photonics
    Volume5
    Issue number11
    DOIs
    Publication statusPublished - 21 Nov 2018

    Keywords

    • anti-Stokes fluorescence
    • exciton-polaritons
    • microcavities
    • organic semiconductor

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