The orientational self-action of a light beam in (1) transparent planar nematic liquid crystal (NLC) subjected to external
DC field and (2) planar NLC doped with stilbene dye in the absence of external field has been studied. It is shown that
the shapes of the aberrational patterns developed in the far-field diffraction zone are highly asymmetric, unlike the common
system of concentric rings. In case (1) the aberrational pattern exhibits complex dynamics of its formation. The
shape of the pattern is independent of the polarization of the incident light. In case (2), the divergence of the pattern does
depend on the incident-light polarization. In both cases, the light-induced director deformation in the field of the ordinary
wave was found. The physical mechanisms of the director reorientation responsible for the asymmetric aberrational patterns
are discussed.
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