23 March 1999 Dye sensitization in a highly sensitive photopolymerizable system for real-time holography
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Abstract
The spectral sensitivity and the enhancement of the energetic sensitivity are important points to the optimization of photopolymerizable materials. We have studied a polymeric system based on polyvinylalcohol as binder, monomers as acrylamide and dihydroxyethylenbisacrylamide and a photoinitiator system composed by triethanolamine and methylene blue. This system was irradiated with an Ar+ laser tuned at 514 nm, where this material do not absorb. Obtaining diffraction efficiencies of 55% with an energetic expositions of 500 mJcm-2. A possible mechanism of initiation of the photopolymerization process has been proposed by the presence of semireduced methylene blue that has an absorption band at 520 nm.
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Salvador Blaya-Escarre, Luis Carretero-Lopez, Roque F. Madrigal, Ricardo Marin Mallavia, Antonio Fimia, "Dye sensitization in a highly sensitive photopolymerizable system for real-time holography", Proc. SPIE 3638, Holographic Materials V, (23 March 1999); doi: 10.1117/12.342813; https://doi.org/10.1117/12.342813
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