https://doi.org/10.15407/spqeo7.03.326
PACS: 42.70.Ln
The effect of structural-kinetic features
of hologram formation
on holographic properties of photopolymers
T. Smirnova, O. Sakhno*, S. Lozenko
Institute of Physics NAS of Ukraine, 46, prospect Nauky, 03028 Kiev, Ukraine
Phone: +380 (44) 265 12 20, fax: +380 (44) 265 17 52
*Fraunhofer Institute AG Polymerphotochemie Geiselbergstr. 69, D-14476 Golm
Phone: 0331 568 1259, fax: 0331 568 3259, E-mail smirnova@iop.kiev.ua
Abstract. A thermodynamic model of the holographic recording process in photopolymers have been developed. By the example of photopolymerizing compositions PPC-488 containing oligoetheracrylates and neutral components (NC) we have explored dependencies of holographic characteristics of medium on NC concentration and thermodynamic properties of polymer-NC system. The thermodynamic affinity of the polymer forming during recording and NC was evaluated using the difference of their solubility parameters DdP,NC. We have determined the feasible range of variation for DdP,NC and optimal concentration of NC () that ensure high-performance recording. It was ascertained that excess in NC concentration over the optimal value leads to the increase of photoinduced light scattering in the layer. The efficiency of scattering depends on the size of microphase enriched by NC. We have determined the size of microphase particles and its dependence on kinetic parameters of polymerization.
Keywords: photopolymer holographic materials, holographic recording, holographic grating, thermodynamic model.
Paper received 23.04.04; accepted for publication 21.10.04.
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