title: Rewritable optical data storage in azobenzene copolymers.
abstract: We propose to encode optical information through the localized depoling of polar chromophores in thin films of grafted polymeric materials with a femtosecond near IR laser source. This disorientation is promoted through the photoisomerization of the azo-dye component induced by a twophoton absorption process. We show that the resulting localized loss in second harmonic generation efficiency can be exploited in data storage applications. The low irradiation powers used allow for a recycling by reheating and repoling the films leading to a rewritable system.
authors.forename: Denis
authors.initials: D
authors.lastname: Gindre
authors.forename: Alex
authors.initials: A
authors.lastname: Boeglin
authors.forename: Alain
authors.initials: A
authors.lastname: Fort
authors.forename: Loïc
authors.initials: L
authors.lastname: Mager
authors.forename: Kokou D
authors.initials: KD
authors.lastname: Dorkenoo