Numerical Study of Liquid Crystal-Induced Optical Singularities
MOLECULAR CRYSTALS AND LIQUID CRYSTALS(2006)
Abstract
The self-action of a laser beam incident on a liquid crystal cell can cause the refracted beam to exhibit singularities in the optical wave field. We present here a self-consistent study of this phenomenon using a Finite Difference Time Domain (FDTD) solver for non-linear optical devices. The self-consistent liquid crystal director-optics FDTD method treats both the full three-dimensional spatial structures of the refracted beam and the director. This paper presents the algorithm and tests the method by examining the output from a incident Gaussian beam. We discuss quantitative differences between these results and the earlier work, and further investigate the short and long wavelength limits.
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Key words
FDTD method,Freedericks transitions,liquid crystals,optical singularities
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