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The optical anisotropic molecules of Cholesteric Liquid Crystals (CLCs) spiral around a helical axis forming a Bragg-reflector for circular polarized light with the same screw sense and matching wavelength. Light of a different wavelength or polarization is nearly totally transmitted. Furthermore, liquid crystals are materials with high optical nonlinearities due to electronic or reorientational effects at high intensities E g transverse non-linear optical effects like retro-selffocusing and a pinholing effect were demonstrated using CLC mirrors in a cw-Nd: YAG-laser [1].
© 1996 IEEE
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