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Proceedings Paper

Ultrafast relaxation of hot electrons in quantum wires
Author(s): Vladimir V. Mitin; Remis Gaska; R. Mickevicius
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Paper Abstract

Ensemble Monte Carlo simulations of hot nonequilibrium electron relaxation in rectangular GaAs quantum wires is carried out. The simulations demonstrate that the initial stage of hot photoexcited electron cooling dynamics is determined by cascade emission of optical phonons. The second relaxation stage is controlled by inelastic electron interaction with acoustic phonons and exhibits strong dependence on the cross-section of a quantum wire. If electron concentration exceeds 105 cm-1 nonequilibrium (hot) phonon effects come into play and hot phonon thermalization time defines the characteristic electron gas cooling time. In contrast to bulk materials and quantum wells, hot phonon effects in quantum wires are strongly dependent on the initial broadening of energy distribution of photoexcited electrons.

Paper Details

Date Published: 6 May 1994
PDF: 8 pages
Proc. SPIE 2142, Ultrafast Phenomena in Semiconductors, (6 May 1994); doi: 10.1117/12.175911
Show Author Affiliations
Vladimir V. Mitin, Wayne State Univ. (United States)
Remis Gaska, Wayne State Univ. (United States)
R. Mickevicius, Wayne State Univ. (United States)

Published in SPIE Proceedings Vol. 2142:
Ultrafast Phenomena in Semiconductors
David K. Ferry; Henry M. van Driel, Editor(s)

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