EXCITON SCREENING AND LASER PROCESSES IN Zn1-xCdxSe/ZnSe QUANTUM WELL STRUCTURES
Contributo in Atti di convegno
Data di Pubblicazione:
1995
Abstract:
We study the lasing mechanism in Zn1-xCdxSe/ZnSe quantum well structures as a function of the Cd content by magnetoluminescence and absorption spectroscopy. The energy shift of the emission lines has been measured in magnetic field up to 8 T. In quantum wells with x=0.13 lasing seems to be due to free-carrier recombination, while for x=0.26 the stimulated emission is exciton-like. We also determine the threshold for the exciton bleaching by free carriers by measuring absorption in modulation doped quantum wells.
Tipologia CRIS:
04.01 Contributo in Atti di convegno
Keywords:
Zn1-xCdxSe/ZnSe QUANTUM WELL; Lasing process; exciton screening
Elenco autori:
Prete, Paola
Link alla scheda completa:
Titolo del libro:
Proceedings of the "22nd International Conference on The Physics of Semiconductors"