title: Light localization induced enhancement of third order nonlinearities in a GaAs photonic crystal waveguide.
abstract: Nonlinear propagation experiments in GaAs photonic crystal waveguides (PCW) were performed, which exhibit a large enhancement of third order nonlinearities, due to light propagation in a slow mode regime, such as two-photon absorption (TPA), optical Kerr effect and refractive index changes due to free-carriers generated by TPA. A theoretical model has been established that shows a very good quantitative agreement with experimental data and demonstrates the important role that the group velocity plays. These observations give a strong insight into the use of PCWs for optical switching devices.
authors.affiliation: Laboratoire Charles Fabry de l'Institut d'Optique, CNRS, Univ Paris-Sud, Campus Polytechnique, RD128, 91127, Palaiseau Cedex, France. alexandre.baron@institutoptique.fr
authors.forename: Alexandre
authors.initials: A
authors.lastname: Baron
authors.forename: Aleksandr
authors.initials: A
authors.lastname: Ryasnyanskiy
authors.forename: Nicolas
authors.initials: N
authors.lastname: Dubreuil
authors.forename: Philippe
authors.initials: P
authors.lastname: Delaye
authors.forename: Quynh
authors.initials: Q
authors.lastname: Vy Tran
authors.forename: Sylvain
authors.initials: S
authors.lastname: Combrié
authors.forename: Alfredo
authors.initials: A
authors.lastname: de Rossi
authors.forename: Robert
authors.initials: R
authors.lastname: Frey
authors.forename: Gerald
authors.initials: G
authors.lastname: Roosen