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HL: Halbleiterphysik

HL 24: Transporteigenschaften

HL 24.1: Talk

Wednesday, March 29, 2000, 16:00–16:15, H14

Dimensional crossover of exciton hopping relaxation in mesoscopic structures — •Ralf Eichmann, John Golub, and Peter Thomas — Fachbereich Physik und Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, Renthof 5, D-35032 Marburg

We compute the time-resolved and steady state recombination

spectra for excitons in disordered semiconductor strips on the

basis of hopping theory. Exciton hopping undergoes a dimensional

crossover when the hop length is comparable to the strip width.

We show by Monte Carlo simulation that the analysis of

time-resolved photoluminescence spectra for strips of differing

widths provides a measurement of the parameters of the hopping

theory and permits a determination of the hopping mechanism.