Polariton Luminescence in Organic Molecular Systems

Using the non-Markovian theory for the description of polaritons interacting with the molecular vibrations, we calculate polariton luminescence in the polariton basis. We show that the frequency shift and broadening of the polariton spectra strongly depend on the exciton contribution to the polariton, which is a function of frequency. Our non-Markovian theory demonstrates presence of the Fano resonance signatures in the polariton luminescence, spectral narrowing with an increase of the number of molecules when they are placed in a single mode microcavity. In addition, the theory enables us to consider a non-equilibrium (hot) exciton-polariton luminescence and opens a way for its observation in organic-based nanodevices in analogy with the hot luminescence from molecules and crystals.