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Photorefractive asymmetric Fabry–Pérot quantum-well structures yield significantly enhanced diffraction during four-wave mixing by employing the sensitive amplitude and phase control of multiple-beam interference within the device. We present an Al0.1Ga0.9As/GaAs photorefractive quantum-well device with a near optimal input diffraction efficiency of 0.36% and an AlAs/GaAs quantum-well device with an output diffraction efficiency of 200%.
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Kwolek et al. (1995) studied this question.
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