22 October 2004 Controlling of monomer diffusion in an organic-inorganic hybrid photopolymer film for holographic memory
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Abstract
Organic-inorganic nanocomposite films were prepared by dispersing an aromatic methacrylic monomer and a photo-initiator in organic-inorganic hybrid sol-gel matrices. The film properties could be controlled by optimizing the content of an organically modified silica precursor (TSPEG) in the sol-gel matrices. The photopolymer film modified with the organic chain (TSPEG) showed high diffraction efficiency (>90%) under an optimized condition. High diffraction efficiency could be ascribed to the fast diffusion and efficient polymerization of monomers under interference light to generate refractive index modulation. The TSPEG modified photopolymer film could be successfully used for holographic memory. Angular selectivity of the film were 0.46 ~ 0.16 depending on the film thickness in the incident angles between 20° ~ 70°. A digital holographic image and a real object were recorded successfully in the photopolymer film.
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Eunkyoung Kim, Eunkyoung Kim, Nam Kim, Nam Kim, Chang-Won Shin, Chang-Won Shin, Jiyoung Park, Jiyoung Park, Sang-Geun Gil, Sang-Geun Gil, } "Controlling of monomer diffusion in an organic-inorganic hybrid photopolymer film for holographic memory", Proc. SPIE 5560, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications X, (22 October 2004); doi: 10.1117/12.559240; https://doi.org/10.1117/12.559240
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