title: Second- and third-order nonlinearities of novel push-pull azobenzene polymers.
abstract: In this work, the second- and third-order nonlinear optical response of spin-deposited thin films of three different push-pull side chain azobenzene polymers is investigated by the second- and third-harmonic Maker fringes techniques using 30 ps laser pulses at a fundamental wavelength of 1064 nm. Measurements were carried out before and after aligning the chromophores by corona poling of the films, while different polarization configurations have been utilized. Strong dependence of the response upon the structure of the systems has been found, which is related to the different charge transfer within the molecules. The reported findings are compared with already published results.
authors.affiliation: Institut des Sciences et Technologies Moléculaires d'Angers, MOLTECH ANJOU, CNRS UMR 6200, Université d'Angers, 2 Bd Lavoisier, 49045 Angers cedex.
authors.forename: Hasnaa
authors.initials: H
authors.lastname: El Ouazzani
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Iliopoulos
authors.forename: Mindaugas
authors.initials: M
authors.lastname: Pranaitis
authors.forename: Oksana
authors.initials: O
authors.lastname: Krupka
authors.forename: Vitaliy
authors.initials: V
authors.lastname: Smokal
authors.forename: Aleksey
authors.initials: A
authors.lastname: Kolendo
authors.forename: Bouchta
authors.initials: B
authors.lastname: Sahraoui