Linear and nonlinear light propagation at the interface of two homogeneous waveguide arrays

Abstract

We investigate linear and nonlinear light propagation at the interface of two one-dimensional homogeneous waveguide arrays containing a single defect of different strength. For the linear case and in a limited region of the defect size, we find trapped staggered and unstaggered modes. In the nonlinear case, we study the dependence of power thresholds for discrete soliton formation in different channels as a function of defect strength. All experimental results are confirmed theoretically using an adequate discrete model.

Self-Action of Light Fields in Waveguide Photon Structures Based on Electro-Optic Crystals

“…For example, linear and nonlinear surface waves were observed on the boundaries of the stationary periodic waveguide systems formed in a LiNbO 3 crystal by Ti diffusion [44]. The behavior of the light fields near the interfaces between the stationary periodic waveguide structures with different parameters in the LiNbO 3 crystal was investigated both theoretically and experimentally [45]. The special features of manifestation of linear and nonlinear discrete light diffraction in photonic structures with curved waveguide elements in LiNbO 3 were demonstrated in [46].…”

Anderson localization of light at the interface between linear and nonlinear dielectric media with an optically induced photonic lattice

“…The insertion of defects may provide an additional physical mechanism for light confinement and a possibility to control light propagation in photonic lattices. There exist different types of lattice defects, but recently the existence of self-localized structures was demonstrated at the interface between two arrays connected by a defect channel, the so-called phase-slip defect [6,7].…”

Propagation of light in complex photonic lattices with saturable nonlinearity

“…U cilju analize prostiranja svetlosti u okolini defekta koji spaja dva 1D periodična sistema različitih perioda, napravljen je niz 1D rešetki talasovoda koristeći nedopirani kristal LiNbO 3 kao supstrat [153]. Dimenzije uzorka su 1 20 7.8 mm, pri čemu je feroelektična osa kristala usmerena duž pravca dimenzije 7.8 mm.…”