The authors report the first clear observation of Wannier-Stark localisation in an unstrained In0.15Ga0.85As/In0.15Al0.85As superlattice on a strain-relaxed InGaAs buffer layer grown on GaAs substrate. Optical bistability is demonstrated for a resistor-SEED (self-electro-optic effect device) and a symmetric SEED system at an operating wavelength of 877 nm.
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Tominaga et al. (1994) studied this question.
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