title: Forward four-wave mixing with defocusing nonlinearity.
abstract: We experimentally demonstrate degenerate, forward four-wave mixing effects in a self-defocusing photorefractive medium, in both one and two transverse dimensions. We observe the nonlinear evolution of new modes as a function of propagation distance, in both the near-field and far-field (Fourier space) regions.
authors.affiliation: Department of Electrical Engineering, Princeton University, NJ 08544, USA.
authors.forename: Shu
authors.initials: S
authors.lastname: Jia
authors.forename: Wenjie
authors.initials: W
authors.lastname: Wan
authors.forename: Jason W
authors.initials: JW
authors.lastname: Fleischer