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  • Title: Singular optical manipulation of birefringent elastic media using nonsingular beams.
    Author: Brasselet E.
    Journal: Opt Lett; 2009 Oct 15; 34(20):3229-31. PubMed ID: 19838282.
    Abstract:
    It is shown that nonsingular light beams can generate singular birefringent patterns in homogeneous birefringent elastic media. These orientational defects of the optical-axis spatial distribution originate from an optical torque driven by a nonzero longitudinal field component. Singular radial and spin-dependent azimuthal light-induced elastic distortion patterns are described and experimentally observed in a uniform liquid-crystal film in the course of a focused circularly polarized Gaussian beam.
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