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1 September 1995 Photochromics-doped polymer systems as erasable holographic recording media
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Spiropyran doped poly(vinylcarbazole) films have been used to record reversible holograms. The real-time diffraction profile was studied for different exposure energies, film thickness and dye concentration. The photoinduced reversible color change between thermally stable and metastable states of spiropyran molecules can modulate the absorption and the refractive index of the spiropyran doped polymer film. Erasable holograms can be recorded in either stable or metastable states of the spiropyran doped PVCz films of 10 and 50 micrometers prepared by gravity settling method. The grating constant achieved was delta equals 0.58 micrometer using 350 nm UV line of a Krypton-ion laser. It has been found that write, read, and erase (WRE) cycles can be performed repeatedly. High efficiency erasable holographic recording at 350 nm has been performed in spiropyran doped PVCz films and a diffraction efficiency greater than 10% has been achieved.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Fatima Ghailane, Gurusamy Manivannan, and Roger A. Lessard "Photochromics-doped polymer systems as erasable holographic recording media", Proc. SPIE 2554, Growth and Characterization of Materials for Infrared Detectors II, (1 September 1995);

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