title: Image storage in coumarin-based copolymer thin films by photoinduced dimerization.
abstract: We report a technique to encode grayscale digital images in thin films composed of copolymers containing coumarins. A nonlinear microscopy setup was implemented and two nonlinear optical processes were used to store and read information. A third-order process (two-photon absorption) was used to photoinduce a controlled dimer-to-monomer ratio within a defined tiny volume in the material, which corresponds to each recorded bit of data. Moreover, a second-order process (second-harmonic generation) was used to read the stored information, which has been found to be highly dependent upon the monomer-to-dimer ratio.
authors: Denis
authors: D
authors: Gindre
authors: Konstantinos
authors: K
authors: Iliopoulos
authors: Oksana
authors: O
authors: Krupka
authors: Emilie
authors: E
authors: Champigny
authors: Yohann
authors: Y
authors: Morille
authors: Marc
authors: M
authors: Sallé