Radiative emission dynamics of quantum dots in a single cavity   micropillar
  The light emission of self-assembled (In,Ga)As/GaAs quantum dots embedded in single GaAs-based micropillars has been studied by time-resolved photoluminescence spectroscopy. The altered spontaneous emission is found to be accompanied by a non-exponential decay of the photoluminescence where the decay rate strongly depends on the excitation intensity. A microscopic theory of the quantum dot photon emission is used to explain both, the non-exponential decay and its intensity dependence. Also the transition from spontaneous to stimulated emission is studied. 
M. Schwab, H. Kurtze, T. Auer, T. Berstermann, M. Bayer, J. Wiersig,   N. Baer, C. Gies, F. Jahnke, J. P. Reithmaier, A. For...