title: Photosensitive polymeric materials for two-photon 3D WORM optical data storage systems.
abstract: We report the photochemistry and development of a fluorescence readout-based, nonlinear absorption, three-dimensional optical data storage system. In this system, writing was achieved by acid generation upon two-photon absorption (2PA) of a photoacid generator (PAG; at 710 or 730 nm). Readout was then performed by interrogating two-photon-absorbing dyes, after protonation, at 860 nm. Linear and nonlinear photophysical characterization of 2PA PAGs and acid-sensitive fluorescent dyes demonstrates good spectral resolution between the PAG and protonated 2PA dye and relatively high two-photon absorptivity. Solution spectroscopic studies confirm photoacid generation and dye protonation. Two-photon recording and readout of voxels were demonstrated in five and eight consecutive, crosstalk-free layers within a polymer matrix, generating a data storage capacity of up to 1.8 x 10(13) bits/cm(3).
authors.affiliation: Department of Chemistry, University of Central Florida, Orlando, Florida 32816, USA.
authors.forename: Ciceron O
authors.initials: CO
authors.lastname: Yanez
authors.forename: Carolina D
authors.initials: CD
authors.lastname: Andrade
authors.forename: Sheng
authors.initials: S
authors.lastname: Yao
authors.forename: Gheorghe
authors.initials: G
authors.lastname: Luchita
authors.forename: Mykhailo V
authors.initials: MV
authors.lastname: Bondar
authors.forename: Kevin D
authors.initials: KD
authors.lastname: Belfield