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Physics of the Solid State

Межзонное однофотонное поглощение и его линейно-циркулярный дихроизм в кристаллах с учетом эффекта когерентного насыщения

В.Р. Расулов, Р.Я. Расулов, Nurillo Ubaydullo ogli Kodirov, Umida Mamirjonovna Isomaddinova

Published Jan 1, 2023• 0 citations
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Abstract

The polarization, spectral and temperature dependences of the single-photon absorption coefficient of polarized radiation are calculated, and its linear-circular dichroism in crystals of tetrahedral symmetry is researched. In this case, the contribution to the coefficients of one- and two-photon absorption of light from the effect of coherent saturation of optical transitions is taken into account.

DOI
10.21883/ftt.2023.07.55849.77

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The polarization, spectral and temperature dependences of the single-photon absorption coefficient of polarized radiation are calculated, and its linear-circular dichroism in crystals of tetrahedral symmetry is researched. In this case, the contribution to the coefficients of one- and two-photon absorption of light from the effect of coherent saturation of optical transitions is taken into account.
In the article, from a microscopic point of view, the linear-circular dichroism of one-photon between band absorption of light in the Kane approximation in narrow-gap crystals is investigated. The linear-circular dichroism of one-photon absorption of polarized light is calculated taking into account the effect of coherent saturation in photoexcited charge carriers. The matrix elements of one-photon interband optical transitions and the corresponding linear-circular dichroism and the spectral dependence of the light absorption coefficient are calculated.
Развита теория межзонного однофотонного одноквантового поглощения сильной световой волны в алмазоподобных полупроводниках со сложной зоной в многозонном приближении Кейна. Получено аналитическое выражение для вероятности однофотонного межзонного перехода, содержащее зависимость от интенсивности, вектора поляризации и частоты поглощаемого света, а также от зонных параметров полупроводника, где учтен вклад в коэффициенты одноквантового поглощения света эффекта Раби оптических переходов. Показано, что форма края поглощения и линейно-циркулярного дихроизма зависит от степени поляризации света и от параметра Раби.