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A basic feasibility study has been made on a ferroelectric-photoconductor optical storage medium utilizing bismuth titanate and zinc selenide. Both the theory of device operation and experiment are described. Coincident light and electric field are used for WRITE and ERASE functions. The nondestructive READ operation is based on the birefringence properties of the bismuth titanate. Optical-electrical measurements, pattern storage and hologram storage are described. Holographic gratings as fine as 1.26μ were stored. The WRITE energy was approximately 10μJ/(mm)2. Diffraction READ efficiencies of approximately. 011% were measured. The ferroelectric photoconductor optical storage medium compares favorably with other erasible media.
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Keneman et al. (1970) studied this question.
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