Opticals Effects in Liquid Crystals pp 162-164 | Cite as
Enhanced nonlinear birefringence in hybrid aligned nematics
Chapter
Abstract
We show that birefringence can be optically induced in hybrid aligned nematic (HAN) liquid crystals at normal incidence for light fields much lower than the Fredericksz threshold. In this case no threshold exists and the nonlinear optical effect at normal incidence is of the same order as that obtained with homeotropic (HOM) cells for the maximum useful angle. An analysis of the effect of the anchoring energy W s is worked out showing that weak anchoring on the walls enhances the nonlinear effect by one order of magnitude or more.
Keywords
Total Free Energy Nonlinear Optical Effect Strong Anchor Extrapolation Length Weak Anchor
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Notes
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© Springer Science+Business Media Dordrecht 1982