title: Observation of discrete solitons in lattices with second-order interaction.
abstract: We present what we believe to be the first experimental demonstration of discrete solitons under the influence of first- and second-order lattice site interaction in zigzag femtosecond laser-written waveguide arrays. We show how the formation of these entities is affected by different ratios of the interaction strength. Increasing the second-order coupling between the lattices sites yields an almost linear increase of the input power required for soliton formation.
authors.affiliation: Department of Physics and Solid State Institute, Technion, Haifa 32000, Israel. alexander.szameit@uni-jena.de
authors.forename: Alexander
authors.initials: A
authors.lastname: Szameit
authors.forename: Robert
authors.initials: R
authors.lastname: Keil
authors.forename: Felix
authors.initials: F
authors.lastname: Dreisow
authors.forename: Matthias
authors.initials: M
authors.lastname: Heinrich
authors.forename: Thomas
authors.initials: T
authors.lastname: Pertsch
authors.forename: Stefan
authors.initials: S
authors.lastname: Nolte
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann