Europhys. Lett, 47 (5), pp. 628-632 (1999)
Dimensional crossover of exciton hopping relaxation in mesoscopic structures
J. E. Golub, R. Eichmann and P. Thomas
Fachbereich Physik und Wissenschaftliches Zentrum für Materialwissenschaften
Philipps-Universität Marburg, Renthof 5, D-35032 Marburg, Germany
(received 4 May 1999; accepted in final form 6 July 1999)
PACS. 78.20Bh - Theory, models, and numerical
PACS. 78.55 - Photoluminescence.
PACS. 78.30Ly - Disordered solids.
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.
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