Time-resolved study of intervalence band thermalization in a GaAs quantum well
Open Access
- 20 May 1996
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 68 (21) , 2956-2958
- https://doi.org/10.1063/1.116367
Abstract
The thermalization of optically excited cold holes in a GaAs quantum well is investigated by femtosecond two-color pump–probe measurements. Clear evidence is found for scattering from heavy-holes into the lowest light-hole band due to LO-phonon absorption. We obtain firm data on scattering times which depend strongly on lattice temperature. They vary from 230 fs at room temperature to 900 fs at T=105 K. The experimental data are well reproduced by numerical calculations.Keywords
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