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Diffraction properties of highly birefringent liquid-crystal composite gratings

1 March 2000


We have fabricated electrically switchable holographic gratings, using Polaroid Corporation’s DMP-128 photopolymer f illed with the nematic liquid crystal E7. It is shown that a coupled-wave theory that includes the effects of the birefringence of the liquid crystal must be used to explain the diffraction properties of these anisotropic volume gratings. Furthermore, a detailed comparison of theory and experiment provides information about the alignment of the liquid crystal within the polymer host.


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