Gap solitons in optically induced two-dimensional square photonic lattices in LiNbO3:Fe crystals

Abstract

We fabricated two-dimensional square photonic lattices with a backbone structure in self-defocusing LiNbO3:Fe crystals through optical induction. We systematically observed four kinds of gap solitons and their power spectra in the nonlinear photonic lattices. Our results show that the lightwave is confined more tightly when it is launched into a low-index region at the input face of the crystal than when it is launched into a backbone ridge waveguide.

Generation of optical crystals and quasicrystal beams: Kaleidoscopic patterns and phase singularity

“…However, splitting a laser beam into several components of equal intensity usually requires a complicated experimental setup and suffers from low stability. Alternatively, the experimental technique based on Fourier transform of the amplitude mask has been demonstrated to be an extremely stable method for generating the 2D square photonic lattice [12,17,18]. In this paper, we will employ this approach to generate the desired quasicrystal patterns.…”