TWO-PHOTONE LINEAR-CIRCULAR DICHROISM IN NARROW-ZONE SEMICONDUCTORS

The matrix elements of two-photon direct optical transitions between the valence and conduction bands in narrow-gap semiconductors in the three-band Kane model were calculated. All types of optical transitions were analyzed, which differ from the initial states of current carriers, leading to linear-circular dichroism in narrow-gap semiconductors with taking into account the effect of coherent saturation in two-photon optical transitions.

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