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

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 a...

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Bibliographic Details
Published in:ACS photonics 2018-11, Vol.5 (11), p.4343-4351
Main Authors: Georgiou, Kyriacos, Jayaprakash, Rahul, Askitopoulos, Alexis, Coles, David M, Lagoudakis, Pavlos G, Lidzey, David G
Format: Article
Language:English
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Summary: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.
ISSN:2330-4022
2330-4022
DOI:10.1021/acsphotonics.8b00552