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Current-induced spatial patterns of photoluminescence in AlxGa1-xAs/GaAs heterojunctions at quantizing magnetic fields

Novák, V. ; Svonoda, P. ; Kreuzer, Sebastian ; Wegscheider, Werner ; Prettl, Wilhelm
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Date of publication of this fulltext: 30 Nov 2009 14:06


Abstract

A strong spontaneous spatial modulation of the photoluminescence near the AlGaAs/GaAs heterojunction has been found, if an external current and a quantizing magnetic field were applied to a homogeneously illuminated sample. A pattern of quenched and enhanced photoluminescence has been observed whose form varies synchronously with Shubnikov–de Haas oscillations. A phenomenological model of the effect is presented.


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