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Time-resolved study of intervalence band thermalization in a GaAs quantum well

Zeitaufgelöste Untersuchungen von Intervalenzband Thermalisierungen in einem GaAs quantumwell

: Kim, A.M.T.; Hunsche, S.; Dekorsy, T.; Kurz, H.; Köhler, K.

	Applied Physics Letters 68 (1996), No.21, pp.2956-2958 ISSN: 0003-6951 ISSN: 1077-3118

	English
	Journal Article
	Fraunhofer IAF ()
	heterostructure; Heterostruktur; III-V Halbleiter; III-V semiconductors; quantum wells; time resolved measurement; zeitaufgelöste Messung

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 equal 05 K. The experimental data are well reproduced by numerical calculation.

: http://publica.fraunhofer.de/documents/PX-36602.html