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 $5 \mathrm{Gbits}/{\mathrm{cm}}^3$ 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.

© 1999 Optical Society of America

Use of continuous-wave illumination for two-photon three-dimensional optical bit data storage in a photobleaching polymer

Min Gu and Daniel Day
Opt. Lett. 24(5) 288-290 (1999)

Demonstration of partial erasing of picosecond temporal optical data by use of accumulated photon echoes

Ryuzi Yano and Naoshi Uesugi
Opt. Lett. 24(23) 1753-1755 (1999)

Use of two-photon absorption in a photorefractive crystal for three-dimensional optical memory

Yoshimasa Kawata, Hidekazu Ishitobi, and Satoshi Kawata
Opt. Lett. 23(10) 756-758 (1998)

Photorefractive polymers sensitized by two-photon absorption

P. A. Blanche, B. Kippelen, A. Schülzgen, C. Fuentes-Hernandez, G. Ramos-Ortiz, J. F. Wang, E. Hendrickx, N. Peyghambarian, and S. R. Marder
Opt. Lett. 27(1) 19-21 (2002)

Nondestructive readout of a three-dimensional photochromic optical memory with a near-infrared differential phase-contrast microscope

A. Toriumi, J. M. Herrmann, and S. Kawata
Opt. Lett. 22(8) 555-557 (1997)