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We show that the application of an electric field F along the growth axis of a semiconductor superlattice results in a strong localization of the eigenstates, a blue shift of the optical-absorption edge, and the presence of oscillations periodic in F^-1. These unique electro-optical properties are derived here within the framework of a tight-binding description of the envelope functions and also from numerical solutions of the Schr\"odinger equation for a finite set of coupled quantum wells.
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Bleuse et al. (1988) studied this question.
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