Generation of Anti-Stokes fluorescence in a strongly coupled organic semiconductor microcavity

Georgiou, Kyriacos, Jayaprakash, Rahul, Askitopoulos, Alexis, Coles, David M., Lagoudakis, Pavlos G. and Lidzey, David G. (2018) Generation of Anti-Stokes fluorescence in a strongly coupled organic semiconductor microcavity. ACS Photonics, 5 (11), 4343-4351. (doi:10.1021/acsphotonics.8b00552).

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.

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Contributors

University divisions

• Quantum, Light and Matter Group
• Physics & Astronomy (pre 2018 reorg)

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