Acrylamide-based photopolymer used for holographic recording

Green light sensitive acrylamide-based photopolymer system has been prepared. The photosensitive medium was composed of monomer, photoinitiator, charge transfer agents and polymeric film-forming binder. The best Eosin Y, TEA, BAA and AA's concentration were got by optimization of acrylamide-based photopolymers composition. And diffraction efficiency as high as 55% with energetic sensitivity of 60 mJ/cm2 has been obtained in the photosensitive films of 150 μm thickness. The principle of photopolymerization reaction was investigated in the paper, especially the function of charge transfer agents TEA and DPI were studied and we found that there existed a compensation effect between TEA and DPI in the polymerization process of photopolymer.