ACTA

Combined Exciton-Cyclotron Resonance in Photoluminescence of a Two-Dimensional Hole Gas

J. Jadczak^a, L. Bryja^a, P. Płochocka^b, A. Wójs^a, J. Misiewicz^a, D. Maude^b and M. Potemski^b
^aInstitute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
^bGrenoble High Magnetic Field Laboratory, CNRS, Grenoble, France

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A two dimensional hole gas in an asymmetric GaAs/Ga_1-xAl_xAs quantum well is studied by polarization resolved photoluminescence in high magnetic fields (up to B = 20 T) and at low temperatures (down to T = 50 mK). In addition to the previously reported dominant emission channels of various free and acceptor bound trions, the high energy hole cyclotron replicas of the bound states are now also observed, corresponding to the combined exciton-cyclotron resonance. Identification of different transitions in the rich, multi peak spectra was possible by the analysis of optical selection rules and comparison of the experimental spectra with realistic numerical calculations.

DOI: 10.12693/APhysPolA.116.852
PACS numbers: 73.20.Mf, 71.35.Ji, 71.35.Pq, 78.20.Ls