METHYLENE-BLUE SENSITIZED POLY(METHYL METHACRYLATE) MATRIX - A NOVEL HOLOGRAPHIC MATERIAL

Methylene blue sensitized poly(methyl methacrylate) is shown to be an efficient medium for recording three-dimensional holographic gratings. Phase and/or amplitude holograms can be written in the methylene blue sensitized films of poly(methyl methacrylate) with a conventional sou rce of light, a He-Ne laser operating at 632.8 nm. Diffraction efficie ncies of 60% were found for thick holograms. Multiple holograms were r ecorded in the described system, and an optical erasing of holograms w as achieved. Hologram recording speed was found to increase with tempe rature.