Observation of intersubband real-space transfer in GaAs/AlAs quantum-well structures due to Gamma-X mixing

Authors
Schmidt, SR Zibik, EA Seilmeier, A Vorobjev, LE Zhukov, AE Ustinov, UM
Citation
Sr. Schmidt et al., Observation of intersubband real-space transfer in GaAs/AlAs quantum-well structures due to Gamma-X mixing, APPL PHYS L, 78(9), 2001, pp. 1261-1263
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
78
Issue
9
Year of publication
2001
Pages
1261 - 1263
Database
ISI
SICI code
0003-6951(20010226)78:9<1261:OOIRTI>2.0.ZU;2-8
Abstract
The Gamma (2)-X-z1 intersubband dynamics in GaAs/AlAs quantum-well structur es is investigated by time-resolved infrared pump and probe experiments. In the studied structure, the second Gamma level in GaAs is nearly resonant t o the first X-z level in AlAs, resulting in elastic Gamma -X scattering. A biexponential behavior of ground-state recovery has been found with a time constant in the order of 1 ps for the Gamma (2)-Gamma (1) relaxation and a time constant of 7 ps (at 10 K), which represents the X-z-Gamma (2) transfe r. (C) 2001 American Institute of Physics.