Abstract
The dynamics of an exciton-LO phonon system after an ultrafast optical excitation in an $\mathrm{In}\mathrm{As}∕\mathrm{Ga}\mathrm{As}$ quantum dot is studied theoretically. Influence of anharmonic phonon damping and its interplay with the phonon dispersion is analyzed. The signatures of the zone-edge decay process in the absorption spectrum and time evolution are highlighted, providing a possible way of experimental investigation on phonon anharmonicity effects.
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