The fast recovery dynamics of a quantum dot semiconductor optical amplifier

We consider a rate equation model of a quantum dot semiconductor optical amplifier that takes into account carrier capture, escape, and Pauli blocking processes. We evaluate possible differences between phonon-assisted or Auger processes being dominant for recovery. An analytical solution which corresponds to phonon-assisted interaction is then used to accurately fit experimental recovery curves and allows an estimation of both the carrier capture and escape rates. (C) 2009 American Institute of Physics. (DOI: 10.1063/1.3098361