Circular polarization of the photoluminescence from a system of two-dimensional A + centers in a magnetic field
Tóm tắt
A series of GaAs/AlGaAs quantum well structures with different concentrations of A
+ centers is studied experimentally by polarized photoluminescence spectroscopy. The spectral dependences of the circular polarization and the energy shifts in a magnetic field exhibit qualitatively different behavior for samples corresponding to the weak and strong localization conditions. The results obtained are explained in the context of a suggested model describing optical transitions between states of localized and free electrons and A
+ centers.
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