We theoretically calculate the electric field induced refractive change index for the ground to first excited state transition in the conduction band of asymmetrical quantum wells. We show that there is a significant change in stark shifts and the refractive index with asymmetry potential. Comparing the results for a square, graded, and step well, it is found that larger refractive index change can be achieved in a step well by a proper choice of the step potential.
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Digant P. Davé (1993) studied this question.
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