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Multipole surface solitons in layered thermal media
Yaroslav V. Kartashov, Victor A. Vysloukh, Lluis Torner
We address the existence and properties of multipole solitons localized at a thermally insulating interface between uniform or layered thermal media and a linear dielectric. We fin…
Stabilization of higher-order vortices and multi-hump solitons in media with synthetic nonlocal nonlinearities
Yaroslav V. Kartashov, Victor A. Vysloukh, Lluis Torner
We address the evolution of higher-order excited states, such as vortex and multi-hump solitons, in nonlocal media with synthetic, competing focusing and defocusing nonlinearities…
Gap solitons on a ring
Yaroslav V. Kartashov, Boris A. Malomed, Victor A. Vysloukh +1
We introduce a new species of gap solitons (GSs) supported by an azimuthally modulated guiding ring in defocusing cubic media. The periodicity in the azimuthal direction strongly m…
Power-dependent shaping of vortex solitons in optical lattices with spatially modulated nonlinear refractive index
Yaroslav V. Kartashov, Victor A. Vysloukh, Lluis Torner
We address vortex solitons supported by optical lattices featuring modulation of both the linear and nonlinear refractive indices. We find that when the modulation is out-of-phase…
Nonlinear photonic crystals near the supercollimation point
Zhiyong Xu, Bjorn Maes, Xunya Jiang +3
We uncover a strong coupling between nonlinearity and diffraction in a photonic crystal at the supercollimation point. We show this is modeled by a nonlinear diffraction term in a…
Soliton modes, stability, and drift in optical lattices with spatially modulated nonlinearity
Yaroslav V. Kartashov, Victor A. Vysloukh, Lluis Torner
We put forward new properties of lattice solitons in materials and geometries where both, the linear refractive index and the nonlinearity are spatially modulated. We show that the…
Propagation of solitons in thermal media with periodic nonlinearity
Yaroslav V. Kartashov, Victor A. Vysloukh, Lluis Torner
We address the existence and properties of solitons in layered thermal media made of alternating focusing and defocusing layers. Such structures support robust bright solitons even…
Nonlinear switching of low-index defect modes in photonic lattices
Fangwei Ye, Yaroslav V. Kartashov, Victor A. Vysloukh +1
We address nonlinear signal switching between two low-index defect channels induced in periodic optical lattices. In contrast to conventional directional couplers, where the guidin…
Angular surface solitons in sectorial hexagonal arrays
A. Szameit, Y. V. Kartashov, V. A. Vysloukh +7
We report on the experimental observation of corner surface solitons localized at the edges joining planar interfaces of hexagonal waveguide array with uniform nonlinear medium. Th…
Bragg guiding of domain-like nonlinear modes and kink arrays in lower-index core structures
Fangwei Ye, Yaroslav V. Kartashov, Victor A. Vysloukh +1
We introduce a novel class of stable nonlinear modes trapped in a lower-index film core sandwiched between two optical lattices, or in the cylindrical core of a radial lattice, imp…
Observation of surface solitons in chirped waveguide arrays
A. Szameit, Yaroslav V. Kartashov, F. Dreisow +6
We report the observation of surface solitons in chirped semi-infinite waveguide arrays whose waveguides exhibit exponentially decreasing refractive indices. We show that the power…
Brownian soliton motion
Yaroslav V. Kartashov, Victor A. Vysloukh, Lluis Torner
We reveal fundamental analogies between soliton dynamics in light-induced random photonic lattices and Brownian motion of particles. In particular, we discover that the average squ…
Surface solitons at interfaces of arrays with spatially-modulated nonlinearity
Y. V. Kartashov, V. A. Vysloukh, A. Szameit +6
We address the properties of two-dimensional surface solitons supported by the interface of a waveguide array whose nonlinearity is periodically modulated. When the nonlinearity st…
Surface lattice solitons in diffusive nonlinear media
Yaroslav V. Kartashov, Victor A. Vysloukh, Lluis Torner
We address the properties of surface solitons supported by optical lattices imprinted in photorefractive media with asymmetric diffusion nonlinearity. Such solitons exist only in f…
Observation of two-dimensional lattice interface solitons
A. Szameit, Y. V. Kartashov, F. Dreisow +7
We report on the experimental observation of two-dimensional solitons at the interface between square and hexagonal waveguide arrays. In addition to the different symmetry of the l…
Optical surface waves supported and controlled by thermal waves
Yaroslav V. Kartashov, Victor A. Vysloukh, Lluis Torner
We address the formation of optical surface waves at the very edge of semiconductor materials illuminated by modulated light beams that generate thermal waves rapidly fading in the…