The quantum-confined Stark effect (QCSE) in one-dimensional (ID) structures is expected to display enhanced transfer of oscillator strength1 and enhanced Stark shifts2 compared with two-dimensional (2D) systems. ID quantum wires (QWRs) are, however, characterized by a 2D confinement potential that may have important consequences: the QCSE thus becomes two dimensional (2D-QCSE), Here we report an experimental and theoretical investigation of the 2D-QCSE in V-groove QWRs. We observe the 2D-QCSE and find striking effects due to electron or hole wave-function splitting. Furthermore, interplay of electric field, geometry, and valence band mixing gives rise to new tunable features in polarization anisotropy.

© 1998 Optical Society of America

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