Time resolved spectroscopy of CdSe, using monopulsed picosecond excitation

We have studied at 4.2 K, the time resolved luminescence of CdSe platelets, using two photons absorption and monopulsed excitation. From the analysis of the A-LO excitonic lineshape, we have obtained the relaxation kinetics of the exciton temperature during the first 1.3 nsec. We deduce the loss rate d< E>/d t of the mean exciton energy. We report also at higher excitation, the occurence of new lines in the luminescence spectrum.