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 supresses the emission of Stokes-shifted fluorescence, as it is located energetically below the cut-off frequency of the cavity.
@article{arxiv.1804.06832,
title = {Generation of Anti-Stokes Fluorescence in a Strongly Coupled Organic Semiconductor Microcavity},
author = {Kyriacos Georgiou and Rahul Jayaprakash and Alexis Askitopoulos and David M. Coles and Pavlos G. Lagoudakis and David G. Lidzey},
journal= {arXiv preprint arXiv:1804.06832},
year = {2018}
}