Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf
1 PublicationMechanism for the generation of coherent longitudinal-optical phonons in GaAs/AlGaAs multiple quantum wells
Yee, K. J.; Lim, Y. S.; Dekorsy, T.; Kim, D. S.
Abstract
We show that coherent optical phonons in GaAs multiple quantum wells are generated in a completely different way compared to bulk GaAs. Unlike in GaAs where the ultrafast screening of electric fields by photogenerated charge carriers is known to be dominant, three distinctive generation mechanisms contribute simoultaneously in multiple quantum wells.
Keywords: coherent phonons; multiple quantum wells; femtosecond spectroscopy
- Physical Review Letters 86 (2001) 1630-1633
Permalink: https://www.hzdr.de/publications/Publ-3862