CARRIER DYNAMICS IN CDSE QUANTUM DOTS EMBEDDED IN GLASS

The relaxation and recombination of carriers excited by ultrashort opt ical pulses are studied on specially prepared II-VI quantum dots in a silicate-type host. Photoluminescence with ps resolution allows to obs erve the emission from the confined, intrinsic energy levels of the do ts under non-and size-selective excitation, respectively. A comparison with data of transient non-linear absorption reveals that the relaxat ion pathway of electron and holes may be substantially different and d epends strongly on the dot size.