Spatio-temporal dynamics of carrier capture processes: Simulation of optical signals

Lengers F., Rosati R., Kuhn T., Reiter D.

Abstract

We perform simulations of time-resolved optical experiments of carrier-capture processes in a quantum wire- dot system. Scattering of charge carriers with optical phonons of the quantum wire can result in transitions from the continuum states of the quantum wire to discrete states of the quantum dot. We treat the scattering of carriers with optical phonons within a Lindblad single-particle approach. By considering the coupling of carriers to a light field we are able to simulate pump-probe experiments which are shown to be capable of measuring the captured populations. We further discuss the influence of the Coulomb interaction on the obtained spectra.