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We demonstrate the first waveguide intensity modulator for visible wavelengths based on the quantum-confined Stark effect. The active waveguide core is composed of 58 Cd0.42Zn0.58Te/ZnTe quantum wells surrounded by Cd0.12Zn0.88Te cladding layers. We obtain ≳10 dB modulation depth at 640 nm with 4 V bias in a 500-μm-long waveguide.
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Lee et al. (1991) studied this question.
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