Title: Nonthermal carrier dynamics in AlxGa1-xAs/GaAs quantum wells
Authors: Sun, KW
Song, TS
Wang, SY
Lee, CP
Department of Electronics Engineering and Institute of Electronics
Keywords: carrier-carrier scattering;LO phonon emission;nonthermal carrier distributions
Issue Date: 1-May-2000
Abstract: We present new time-resolved measurements that demonstrate the effect of injected carrier densities on carrier-carrier scattering rates of highly nonequilibrium carrier distributions in the p-doped Al0.32Ga0.68As/GaAs quantum wells with well width of 5 and 3 nm. The spectra at high densities (greater than or equal to 10(10) cm(-2)) demonstrate that the initially narrow electron distribution is altered in a time less than or equal to the LO phonon emission time as the result of rapid carrier-carrier scattering. At about the same excitation density (similar to 10(10) cm(-2)), the carrier-carrier scattering rate is faster in 3 nm quantum wells in comparison to 5 nm wells. Our results also indicate that carrier-carrier scattering becomes as significant as LO phonon emission at density of about 1 X 10(10) cm(-2) in the 5 nm quantum wells. (C) 2000 Elsevier Science B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/S0167-9317(99)00475-X
ISSN: 0167-9317
DOI: 10.1016/S0167-9317(99)00475-X
Volume: 51-2
Begin Page: 189
End Page: 194
Appears in Collections:Conferences Paper

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