Ultra-high density permanent and/or erasable optical memory in photorefractive media formed by ultrafast laser pulses

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A possibility to form tree-dimensional 10Tb-density optical memory based on permanent modification, or damage, of transparent dielectrics, using powerful femtosecond laser pulses has already been demonstrated by the Applicants. This project aims to improve the fundamental understanding of ultrafast laser formation of nano-bits using unique ability of photorefractive materials to reversible change and the refractive index. We aim to find ways for controlling the storage time, density and the writing-reading-erasing rate without inducing damage in the material. The results will be applied to efficient formation of high-speed, high density, write-read-erase 3D optical memory for applications in the information technology.