Tunable positive and negative refraction in optically-induced photonic lattices

Abstract

We study tunable refraction of light in one-dimensional periodic lattices induced optically in a photorefractive crystal. We observe experimentally both positive and negative refraction of beams which selectively excite the first or second spectral bands of the periodic lattice, and demonstrate tunability of the output beam position by dynamically adjusting the lattice depth. At higher laser intensities, the beam broadening due to diffraction can be suppressed through nonlinear self-focusing while preserving the general steering properties.

4 pages, 3 figures

References in corpus (1)

• Controlled generation and steering of spatial gap solitons

Cited by in corpus (8)

• Light propagation and localization in modulated photonic lattices and waveguides
• Nonlinear optics and light localization in periodic photonic lattices
• Soliton control in modulated optically-induced photonic lattices
• Bragg-type soliton mirror
• Beam steering and topological transformations driven by interactions between discrete vortex and fundamental solitons
• Solitary Wave Formation under the Interplay between Spatial Inhomogeneity and Nonlocality
• Negative refraction and spatial echo in optical waveguide arrays
• Soliton shape and mobility control in optical lattices