TRANSIENT PHOTOBLEACHING IN THE QUANTUM-DOT QUANTUM-WELL CDS HGS/CDS/

Transient photobleaching experiments have been performed with spherica lly layered semiconductor particles consisting of a size quantized cor e of CdS, one monolayer of HgS and three monolayers of CdS as the oute rmost shell. The most interesting result from these experiments is tha t the photobleaching follows spectrally the newly evolving 1s-1s elect ronic transition of the composite particles. Some considerations conce rning the charge carrier dynamics in the novel quantum dot quantum wel ls (QDQWs) are outlined.