Luminescence of coupled quantum wells: Effects of indirect excitons in high in-plane magnetic fields

M. Orlita, R. Grill, M. Zvára, G. H. Döhler, S. Malzer, M. Byszewski, and J. Soubusta
Phys. Rev. B 70, 075309 – Published 20 August 2004

Abstract

Luminescence measurements of a Ga1xAlxAsGaAs double quantum well in in-plane magnetic fields up to 22T are reported. The properties of spatially direct and indirect excitons are studied. We show that the strong indirect exciton luminescence survives in samples with low nonradiative recombination up to high in-plane magnetic fields. This contrasts with previously published results, where its strong suppression, observed for magnetic fields as low as of 10T, was explained by the exciton center-of-mass momentum conservation. We attribute the discrepancy to a relatively low nonradiative recombination in the studied sample in comparison with the radiative recombination of localized indirect excitons.

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  • Received 19 January 2004

DOI:https://doi.org/10.1103/PhysRevB.70.075309

©2004 American Physical Society

Authors & Affiliations

M. Orlita*, R. Grill, and M. Zvára

  • Institute of Physics, Charles University, Ke Karlovu 5, CZ-121 16 Prague 2, Czech Republic

G. H. Döhler and S. Malzer

  • Institute für Technische Physik I, Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany

M. Byszewski

  • Grenoble High Magnetic Field Laboratory, Boîte Postale 166, F-38042 Grenoble Cedex 09, France

J. Soubusta

  • Joint Laboratory of Optics, Palacký University, 17. listopadu 50, CZ-772 07 Olomouc, Czech Republic

  • *Electronic address: orlita@karlov.mff.cuni.cz

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Issue

Vol. 70, Iss. 7 — 15 August 2004

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