Abstract

A holographic material based on a photopolymerizable nematic acrylate was improved by the addition of the trithiocarbonate, EtO2CCH2SC(S)SCH2CO2Et, increasing uniformity and reproducibility in the formation of electrically switchable holographic gratings. Diffraction efficiencies as high as 34%, the thin-grating theoretical maximum, were achieved at large (1014μm) grating spacings. Improved diffraction efficiency was seen over a range of grating spacings (0.3510μm). The exposure window for grating formation was increased by an order of magnitude, resulting in much improved reproducibility.

© 2006 Optical Society of America

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