Intersubband relaxation lifetimes in p-GaAs/AlGaAs quantum wells below the LO-phonon energy measured in a free electron laser experiment
- 1 January 1999
- journal article
- letter
- Published by IOP Publishing in Semiconductor Science and Technology
- Vol. 14 (8) , L25-L28
- https://doi.org/10.1088/0268-1242/14/8/101
Abstract
Lifetimes for the LH1 to HH1 transition in GaAs/AlGaAs quantum wells are measured by pump and probe spectroscopy using a free electron laser. The energy of the LH1 to HH1 transition is below that of the longitudinal optical phonon. A value of 55 ps is found for a 67 Å wide well at 8 K. Comparisons with recent measurements for electron systems are presented.Keywords
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