Abstract

General expressions obtained earlier for nonlinear photogeneration rates of electron–hole pairs (EHPs) under conditions of n-photon–one-photon resonance on adjacent interband transitions are used to analyze manifestations of the resonance optical Stark effect in the case n=4. Because of the appearance of new Van Hove singularities in the electronic band spectrum reconstructed in the field of a strong electromagnetic wave, the multiphoton EHP-generation rate W<sup>(4)</sup> is a nonmonotonic function of radiation intensity j and includes a region of extremely rapid growth, in which a small change of j causes W<sup>(4)</sup> to increase by several orders of magnitude.

© 2014 Optical Society of America

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