Abstract
The non linear interaction between the steady state carrier distribution in aphotoexcited polar semiconductor and the population generated by a second light source is studied theoretically. We analyze the changes in mobility and optical absorption as a function of the intensities and energies of the light sources and as a function of the intensity of an applied electricfield. We find that the interaction between the two carrier populations generated by the light sources can serve as a mechanism of modulation for the carrier mobility and optical absorption.
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