1 May 2014 Spatial frequency response of a volume hologram recorded in a ZrO2 nanoparticle-dispersed acrylate photopolymer film containing chain transfer agents
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Abstract
Photopolymerizable nanoparticle-polymer composites (NPCs) have thus far shown their excellent performance in various applications, such as holographic data storage, nonlinear optics and neutron optics. Specifically, for such applications, a high spatial frequency material response is necessary, as it is the response to high spatial frequencies that determines their spatial resolution and diffraction properties. However, it is known that the spatial frequency response of a recorded hologram in multi-component photopolymers including NPCs and holographic polymer-dispersed liquid crystals exhibits a reduction in refractive index modulation at high spatial frequencies. In order to overcome this drawback, an addition of chain transfer agents (CTAs) may be useful as done for all-organic photopolymers to modify their nonlocal response and phase separation characteristics. In our work, we investigate the effect of CTAs on the spatial frequency response in NPCs. Here we employ various chain-transfer agents with three different thiol groups in a photopolymerizable ZrO2 NPC film. A range of CTA concentration is carried out, in order to explore the most effective material combination used in the examination of spatial frequency response. The significant improvement in spatial frequency response of NPCs through the addition of a CTA with the most appropriate concentration is presented.
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Jinxin Guo, Jinxin Guo, Ryuta Fujii, Ryuta Fujii, Yasuo Tomita, Yasuo Tomita, } "Spatial frequency response of a volume hologram recorded in a ZrO2 nanoparticle-dispersed acrylate photopolymer film containing chain transfer agents", Proc. SPIE 9131, Optical Modelling and Design III, 913118 (1 May 2014); doi: 10.1117/12.2052291; https://doi.org/10.1117/12.2052291
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