title: Simultaneous two and three photon resonant enhancement of third-order NLO susceptibility in an azo-dye functionalized polymer film.
abstract: We report the observation of simultaneous two and three photon resonances, enhancing the third-order NLO susceptibility in a thin film of an azo-dye polymer. The possibility of 2-3 orders of magnitude increase in χ((3)) susceptibility is sustained by quantum mechanical calculations. This improves the applications of azo-polymers in all optical signal processing as well as in nonlinear optical imaging.
authors.affiliation: Centre for Organic Chemistry Costin D. Nenitescu, Romanian Academy, Bucharest, Romania.
authors.forename: Florica Adriana
authors.initials: FA
authors.lastname: Jerca
authors.forename: Valentin Victor
authors.initials: VV
authors.lastname: Jerca
authors.forename: Francois
authors.initials: F
authors.lastname: Kajzar
authors.forename: Ana Maria
authors.initials: AM
authors.lastname: Manea
authors.forename: Ileana
authors.initials: I
authors.lastname: Rau
authors.forename: Dumitru Mircea
authors.initials: DM
authors.lastname: Vuluga