title: Third-order nonlinearity of nickel oxide nanoparticles in toluene.
abstract: We report measurements of the nonlinear refractive index, n(2), of nickel oxide nanoparticles (NPs) in toluene at 532 nm. The measurements were performed using the Z-scan technique with 80 ps laser pulses at 7 Hz. Large values of n(2) in the range of 10(-13)-10(-12) cm(2)/W were measured, and negligible two-photon absorption coefficient was estimated for colloids having NP filling fractions in the range of 10(-8)-10(-7).
authors.affiliation: Departamento de Física, Universidade Federal de Pernambuco, Pernambuco, Brazil.
authors.forename: Luis A
authors.initials: LA
authors.lastname: Gómez
authors.forename: Cid B
authors.initials: CB
authors.lastname: de Araújo
authors.forename: L M
authors.initials: LM
authors.lastname: Rossi
authors.forename: S H
authors.initials: SH
authors.lastname: Masunaga
authors.forename: R F
authors.initials: RF
authors.lastname: Jardim