Interband Multiphoton Absorption of Polarized Radiation and Its Linear Circular Dichroism in Semiconductors in the Kane Approximation

Expressions for the spectral and temperature dependences of the partial coefficients of interband multiphoton absorption of light are determined, which differ from each other by the types of virtual optical transitions, depending on the degree of polarization of light. A quantitative analysis of the coefficient of multiphoton interband linear-circular dichroism is carried out. A quantitative analysis of the spectral dependence of two and three-photon interband light absorption in the InSb semiconductor is carried out, the quantitative calculation of which is based on perturbation theory in the Kane approximation, where the energy spectrum of current carriers is assumed to be spherically symmetric.