This article is cited in 3 papers

Semiconductor structures, low-dimensional systems, quantum phenomena

Circular polarization of the photoluminescence from a system of two-dimensional $A^+$ centers in a magnetic field

P. V. Petrov, Yu. L. Ivanov, N. S. Averkiev

Ioffe Institute, St. Petersburg

Abstract: 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.

Received: 21.12.2010
Accepted: 27.12.2010

 English version: Semiconductors, 2011, 45:6, 776–782

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