Abstract
A set of high quality Zn 1-x Cd x Se/ZnSe quantum well structures with various well widths and Cd contents as well as Zn 1-x Cd x Se epilayers are grown by molecular beam epitaxy. Their optical properties are investigated by measuring photoluminescence, reflection, and transmission as a function of a vertically applied electric field. The quantum-confined Stark effect is observed at 5 K and a change in transmission of more than 30% achieved at 300 K. By means of numerical model calculations, the underlying electro-absorption and electro-refraction spectra are deduced and the field-induced change of the relevant exciton parameters (resonance energy, oscillator strength, broadening) derived.
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