Correlated Photon-Pair Emission from a Charged Single Quantum Dot
  The optical creation and recombination of charged biexciton and trion complexes in an (In,Ga)As/GaAs quantum dot is investigated by micro-photoluminescence spectroscopy. Photon cross-correlation measurements demonstrate the temporally correlated decay of charged biexciton and trion states. Our calculations provide strong evidence for radiative decay from the excited trion state which allows for a deeper insight into the spin configurations and their dynamics in these systems. 
S. M. Ulrich, M. Benyoucef, P. Michler, N. Baer, P. Gartner, F.   Jahnke, M. Schwab, H. Kurtze, M. Bayer, S. Fafard, and Z. ...