Photocurrent spectroscopy is used to investigate the quantum-confined Stark shift of In0.5Ga0.5As/GaAs self-assembled quantum dots grown on (100) and (311)B planes. By comparing the Stark shift for dots grown on (100) and (311)B planes, we find that in the (311)B dots, the electron and hole wave functions are displaced by a strain-induced piezoelectric field directed from the apex to the base of the dots.
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Patanè et al. (2000) studied this question.
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