Authors: Michael R Gleeson Shui Liu John T Sheridan
Publish Date: 2009/11/01
Volume: 44, Issue: 22, Pages: 6090-6099
Abstract
Photopolymer materials are practical materials for use as holographic recording media due to the fact that they are inexpensive selfprocessing materials with the ability to record low loss highly diffraction efficient volume holographic gratings In general these materials absorb light of an appropriate wavelength causing photopolymerization of the local monomer inducing a change in the material’s refractive index These small changes in refractive index enable the storage of large quantities of data using holographic techniques In an attempt to further develop the data storage capacity and quality of the information stored ie resolution in such materials a deeper understanding of the photochemical mechanisms present during the formation of holographic gratings has become ever more crucial From this understanding the response of an acrylamide/polyvinylalcohol based photopolymer to high spatial frequency information is improved through the addition of a chain transfer agent ie sodium formate HCOONa
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