Nonlinear Phenomena in Complex Systems, 2026, Vol.29, No.1, pp.69

NONLINEAR PHENOMENA IN COMPLEX SYSTEMS
An Interdisciplinary Journal

2026, Vol.29, No.1, pp.69 - 74

Circularly Polarized Beams Phase Transformation via Tunable Liquid Crystal Periodic Structure

K. Pantsialeyeva, E. Melnikova, and A. Tolstik

Nematic liquid crystal elements spatially structured in the azimuthal direction represent a special type diffraction grating capable of achieving a diffraction efficiency of up to 100%. This paper is devoted to the development and study of the spatial polarization properties of a liquid crystal diffraction polarizing twist element, in which a phase profile equivalent to a diffraction polarizing grating is realized by spatially modulating the topology of the director orientation using the method of polarization holographic recording of surface anisotropy in the azo dye AtA-2 layer. The efficient electrical control possibility of the diffraction and the structured element polarization properties, their ambivalence when changing the side of light input into the liquid crystal element are experimentally demonstrated. The optimal value of the external control voltage corresponding to the maximum diffraction efficiency above 90% for circularly polarized radiation is determined.

Key words: diffraction grating, polarizing grating, nematic liquid crystal, polarization, light-induced orientation, azo dye
DOI: https://doi.org/10.5281/zenodo.19347113

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