Exciton Exchange between Nearly-Free and Acceptor-Bound States of a Positive Trion Assisted by Cyclotron Excitation |
| J. Jadczaka, L. Bryjaa, A. Wójsa, G. Bartschb, D.R. Yakovlevb, M. Bayerb, P. Plochockac, M. Potemskic, D. Reuterd and A. Wieckd
aInstitute of Physics, Wrocław University of Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland bExperimentelle Physik 2, Technische Universität Dortmund, D-44227 Dortmund, Germany cGrenoble High Magnetic Field Laboratory, CNRS, 38-042 Grenoble, France dLehrstuhl fur Festkörperphysik, Ruhr Universität, Universitätstr., Bochum, Germany |
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| In magneto-photoluminescence spectra of a two-dimensional hole gas in a GaAs quantum well we observe coupling of two different radiative states. The pair of coupled states are an acceptor-bound trion AX+ and an essentially free (only weakly localized by a shallow lateral potential) trion X+, brought into resonance by an additional cyclotron excitation controlled by the magnetic field. The coupling mechanism is the exciton transfer, and the optical signature is a clear anticrossing of the emission lines of an X+ and a cyclotron replica of the AX+. |
| DOI: 10.12693/APhysPolA.119.600 PACS numbers: 73.20.Mf, 71.35.Ji, 71.35.Pq, 78.20.Ls |