Use of two-photon excitation for erasable–rewritable three-dimensional bit optical data storage in a photorefractive polymer

Abstract

We report what is believed to be the first use of a photorefractive polymer in erasable-rewritable three-dimensional bit optical data storage under two-photon excitation. We successfully demonstrate writing, erasing, and rewriting of multilayered information in a photorefractive polymer consisting of 2,5-dimethyl-4-(p-nitrophenylazo)anisole, 2,4,7-trinitro-9-fluorenone, 9-ethylcarbazole, and poly(N-vinylcarbazole). A three-dimensional bit density of 5 Gbits/cm(3) is achieved by two-photon absorption under pulsed beam illumination at an infrared wavelength of 800 nm in the recording process. Complete erasing of the recording information is achieved by use of ultraviolet illumination.

Optical storage arrays: a perspective for future big data storage

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Enhanced two-photon absorption of CdS nanocrystal rods

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Two-photon energy transfer enhanced three-dimensional optical memory in quantum-dot and azo-dye doped polymers

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