The quantum confined Pockels effect results from the combination of the genuine interface roto-inversion asymmetry and the breakdown of quantum well inversion symmetry due to the applied electric field. It is currently understood in terms of the field-dependent mixing of the heavy and light hole states at the center of the minizone. Here we investigate how excitonic interaction modifies the predictions of band-to-band calculations, and compare theory with experimental results obtained in In x Ga 1Ϫx As-InP quantum wells.
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