Exciton-LO-phonon dynamics in InAs/GaAs quantum dots: Effects of zone-edge phonon damping
Pawel Machnikowski, Lucjan Jacak
TL;DR
This paper theoretically investigates how anharmonic phonon damping and phonon dispersion influence exciton-LO-phonon dynamics in InAs/GaAs quantum dots, highlighting signatures in spectra that could reveal phonon anharmonicity effects.
Contribution
It introduces a theoretical analysis of zone-edge phonon damping effects on exciton-LO-phonon interactions in quantum dots, considering phonon dispersion.
Findings
Zone-edge decay signatures appear in absorption spectra.
Anharmonic phonon damping significantly affects exciton-phonon dynamics.
The study suggests experimental methods to observe phonon anharmonicity effects.
Abstract
The dynamics of an exciton-LO-phonon system after an ultrafast optical excitation in an InAs/GaAs 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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