Line broadening caused by Coulomb carrier–carrier correlations and dynamics of carrier capture and emission in quantum dots

Abstract

Mechanisms of pure dephasing in quantum dots due to Coulomb correlations and the dynamics of carrier capture and emission are suggested, and a phenomenological model for the dephasing is developed. It is shown that, if the rates of these capture and emission processes are sufficiently high, significant homogeneous line broadening of the order of several meV can result.