Crossover from self-defocusing to discrete trapping in nonlinear waveguide arrays

Abstract

We predict a sharp crossover from nonlinear self-defocusing to discrete self-trapping of a narrow Gaussian beam with the increase of the refractive index contrast in a periodic photonic lattice. We demonstrate experimentally nonlinear discrete localization of light with defocusing nonlinearity by single site excitation in LiNbO${}_3$ waveguide arrays.

6 pages, 4 figures

References in corpus (4)

• Spatial Solitons in Optically-Induced Gratings
• Discrete solitons and soliton-induced dislocations in partially-coherent photonic lattices
• Wannier functions analysis of the nonlinear Schrödinger equation with a periodic potential
• Nonlinear Bloch-wave interaction and Bragg scattering in optically-induced lattices

Cited by in corpus (15)

• Light propagation and localization in modulated photonic lattices and waveguides
• Observation of surface gap solitons in semi-infinite waveguide arrays
• Discrete soliton mobility in two-dimensional waveguide arrays with saturable nonlinearity
• Diffraction-managed solitons and nonlinear beam diffusion in modulated arrays of optical waveguides
• Discrete solitons in electromechanical resonators
• Nonlinear optics and light localization in periodic photonic lattices
• Beam interactions in one-dimensional saturable waveguide arrays
• Solitons in one-dimensional nonlinear Schrödinger lattices with a local inhomogeneity
• Observation of higher-order solitons in defocusing waveguide arrays
• Simple and efficient generation of gap solitons in Bose-Einstein condensates
• Self-trapping of polychromatic light in nonlinear photonic lattices
• Nonlinear directional coupler for polychromatic light
• Dynamical Barrier for the Formation of Solitary Waves in Discrete Lattices
• Transversely Stable Soliton Trains in Photonic Lattices
• Soliton shape and mobility control in optical lattices