title: High third-order nonlinear optical susceptibility in new fluorinated poly(p-phenylenevinylene) copolymers measured with the Z-scan technique.
abstract: The third-order nonlinear optical properties of a series of copoly(2, 3, 5, 6-tetrafluoro-1, 4-phenylenevinylene-2, 5-dioctyloxy-1, 4-phenylenevinylene) that contain variable ratios of two differently substituted monomers have been studied in chloroform solutions at l=1064 nm by the picosecond Z-scan technique. Nonlinear refractive index n(2) of the samples investigated has been found to be negative, and a strong dependence of its magnitude on the copolymer's composition has been observed. The highest third-order nonlinear optical susceptibility, |x((3))|=(6 +/- 2)x 10(-10) esu, was measured for a copolymer obtained by reaction of equimolar quantitites of the parent monomers.
authors.forename: T
authors.initials: T
authors.lastname: Cassano
authors.forename: R
authors.initials: R
authors.lastname: Tommasi
authors.forename: F
authors.initials: F
authors.lastname: Babudri
authors.forename: A
authors.initials: A
authors.lastname: Cardone
authors.forename: G M
authors.initials: GM
authors.lastname: Farinola
authors.forename: F
authors.initials: F
authors.lastname: Naso