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24 May 2018 Spatial frequency response of nanocomposite holographic gratings
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We investigate the spatial frequency response of a volume grating recorded in a ZrO2 nanoparticle-dispersed nanocomposite. We experimentally find that there exists the optimum recording intensity to maximize the saturated refractive index modulation amplitude of a nanocomposite grating recorded at short and long grating spacing. A strong parametric relationship between grating spacing and recording intensity is seen and an increase in the saturated refractive index modulation amplitude at shorter grating spacing (< 0.5 μm)can be obtained by using higher recording intensities than those at longer grating spacing. Such a trend can be qualitatively explained by a phenomenological model used for holographic polymer-dispersed liquid crystal gratings. We also describe another method for the improvement of the high spatial frequency response by co-doping of thiol monomer that acts as a chain-transfer agent.
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Yasuo Tomita, Toshihiro Nakamura, Agyl F. Rizky, Ryota Fujii, and Jinxin Guo "Spatial frequency response of nanocomposite holographic gratings", Proc. SPIE 10679, Optics, Photonics, and Digital Technologies for Imaging Applications V, 106790U (24 May 2018);

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