Abstract
Light scattering spectra, both stationary response for monochromatic excitation and time-resolved response for pulse excitation, at zero temperature are calculated in the model of a Frenkel exciton coupled to Einstein phonons, by using the dynamical coherent potential approximation. For resonant excitation, calculated spectra are characterized by hot luminescences from a nearly free exciton state and also from vibronic states of a self-trapped exciton. Calculated time-resolved spectra manifest exciton-phonon dynamics involving these states, such as configurational tunneling between the free state and the self-trapped state.
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