Quantum-Confined Stark Effect in Stepped-Potential Quantum Wells

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Abstract
A multi-quantum well pin diode which contains quantum wells where the band gap changes in a steplike manner along the growth direction has been grown by molecular beam epitaxy. The quantum-confined Stark effect has been observed by photocurrent spectroscopy at room temperature, and a larger red shift of the lowest exciton absorption peak in comparison with the conventional rectangular-shaped quantum well has been observed under a considerably large amount of applied electric field.