Magneto-Optical Studies of Quantum States of Two-Dimensional Hole Gas at Single Ga1-xAlxAs/GaAs Heterojunction
L. Bryja
Institute of Physics, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
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The detailed studies of low temperature (T=2~K) polarization resolved photoluminescence and photoluminescence excitation studies from heavily modulation doped Ga1-xAlx/GaAs single heterojunctions in continuous wave and time-resolved conditions are reported. The free conduction band GaAs electrons recombination with two-dimensional holes observed in low magnetic fields enabled us to determine experimentally the valence subband Landau levels. The high magnetic field photoluminescence spectra are dominated by excitonic transitions which are attributed to neutral excitons rather than to positively charged ones.
DOI: 10.12693/APhysPolA.106.131
PACS numbers: 78.55.Cr, 71.70.Di