TIME-RESOLVED STUDY OF INTERVALENCE BAND THERMALIZATION IN A GAAS QUANTUM-WELL

Authors
KIM AMT HUNSCHE S DEKORSY T KURZ H KOHLER K
Citation
Amt. Kim et al., TIME-RESOLVED STUDY OF INTERVALENCE BAND THERMALIZATION IN A GAAS QUANTUM-WELL, Applied physics letters, 68(21), 1996, pp. 2956-2958
Citations number
14
Categorie Soggetti
Physics, Applied
Journal title
Applied physics letters → ACNP
ISSN journal
00036951
Volume
68
Issue
21
Year of publication
1996
Pages
2956 - 2958
Database
ISI
SICI code
0003-6951(1996)68:21<2956:TSOIBT>2.0.ZU;2-7
Abstract
The thermalization of optically excited cold holes in a GaAs quantum w ell is investigated by femtosecond two-color pump-probe measurements. Clear evidence is found for scattering from heavy-holes into the lowes t light-hole band due to LO-phonon absorption. We obtain firm data on scattering times which depend strongly on lattice temperature. They va ry from 230 fs at room temperature to 900 fs at T = 105 K. The experim ental data are well reproduced by numerical calculations. (C) 1996 Ame rican Institute of Physics.