Межзонный двухфотонный линейно-циркулярный дихроизм в полупроводниках в приближении Кейна

Физика и техника полупроводников Pub Date : 2022-01-01 DOI:10.21883/ftp.2022.01.51813.9719

В.Р. Расулов, Р.Я. Расулов, Б. Б. Ахмедов, И.А. Муминов

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Abstract

Interband two-photon optical transitions are classified and expressions are obtained for the matrix elements in a narrow-gap semiconductor depending on the band parameters, degree of polarization, and light frequency. It is shown that the main contribution to two-photon linear-circular dichroism in narrow-gap semiconductors is made by optical transitions proceeding from the subband of light holes to the conduction band. The dependences of the partial coefficients of interband two-photon absorption of light, which differ from each other by the types of optical transitions, are analyzed depending on the degree of polarization of the light, and a quantitative analysis of the coefficient of linear-circular dichroism of two-photon absorption of light is carried out. Expressions are obtained for the spectral dependence of the coefficient of interband two-photon absorption of light in narrow-gap semiconductors in the Kane model.

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凯恩近似的双光子线性循环二色现象

本文对窄间隙半导体的带间双光子光学跃迁进行了分类，并根据带参数、偏振度和光频率得到了矩阵元素的表达式。结果表明，窄隙半导体中双光子线圆二色性的主要贡献是由光孔子带到导带的光跃迁引起的。分析了光的偏振度对带间双光子吸收偏系数的依赖关系，并定量分析了双光子吸收的线圆二色性系数。给出了凯恩模型中窄间隙半导体带间双光子吸收系数的光谱依赖性表达式。

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