Nonlinear polarization spectroscopy with nonpolarized light

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作者：

机构：

[1] Gancheryonok, Igor I.

来源：

Gancheryonok, Igor I. | 1600年 / 31期

关键词：

Medium with light induced anisotropy - Mueller matrix - Nonlinear polarization spectroscopy - Nonlinear susceptibility tensor - Nonpolarized light - Polarization nearness - Polarizers;

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摘要：

A new variant of nonlinear polarization spectroscopy that is based on the use of nonpolarized pump (or) and probe beam is presented. We show that in the case of a totally depolarized strong exciting field, an initially isotropic medium acquires the properties of uniaxial absorbing crystal with optical axis along a wave normal of the pump beam. Relationship for a transverse component of the 3rd-order nonlinear susceptibility tensor is derived for arbitrary directions of interacting beams. When a probe beam is totally depolarized, a medium with light-induced anisotropy (MLIA) can be used as a light-absorbing or light-amplifying dynamic polarizer. We analyze the efficiency of such type of light controlled devices on the basis of the polarization nearness. The Mueller matrix of MLIA is calculated and some advantages of the use of partially polarized probe beam are pointed out.

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