title: Counterpropagating surface solitons in two-dimensional photonic lattices.
abstract: We study interaction of counterpropagating beams in truncated two-dimensional photonic lattices induced optically in photorefractive crystals, and demonstrate the existence of counterpropagating surface solitons localized in the lattice corners and at the edges. We display intriguing dynamical properties of such composite optical beams and reveal that the lattice surface provides a strong stabilization effect on the beam propagation. We also observe dynamical instabilities for stronger coupling and longer propagation distances in the form of beam splitting. No such instabilities exist in the single beam surface propagation.
authors.affiliation: Texas A & M University at Qatar, Doha, Qatar. jovic@phy.bg.ac.yu
authors.forename: Dragana
authors.initials: D
authors.lastname: Jović
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar
authors.forename: Raka
authors.initials: R
authors.lastname: Jovanović
authors.forename: Milivoj
authors.initials: M
authors.lastname: Belić
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D015233:Models, Statistical; D017711:Nonlinear Dynamics; D016011:Normal Distribution; D055096:Optical Devices; D055095:Optics and Photonics; D017785:Photons; D012542:Scattering, Radiation; D013499:Surface Properties