title: Observation of dipole-like gap solitons in self-defocusing waveguide lattices.
abstract: We observe dipole-like gap solitons in two-dimensional waveguide lattices optically induced with a self-defocusing nonlinearity. Under appropriate conditions, two mutually coherent input beams excited in neighboring lattice sites evolve into a self-trapped state, whose spatial power spectrum and stability depend strongly on the initial excitation conditions. Our experimental observations are compared with numerical simulations.
authors.affiliation: 1The Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education and TEDA Applied Physical School, Nankai University, Tianjin 300457, China.
authors.forename: Liqin
authors.initials: L
authors.lastname: Tang
authors.forename: Cibo
authors.initials: C
authors.lastname: Lou
authors.forename: Xiaosheng
authors.initials: X
authors.lastname: Wang
authors.forename: Daohong
authors.initials: D
authors.lastname: Song
authors.forename: Xingyu
authors.initials: X
authors.lastname: Chen
authors.forename: Jingjun
authors.initials: J
authors.lastname: Xu
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Chen
authors.forename: H
authors.initials: H
authors.lastname: Susanto
authors.forename: K
authors.initials: K
authors.lastname: Law
authors.forename: P G
authors.initials: PG
authors.lastname: Kevrekidis