Tunable positive and negative refraction in optically-induced photonic lattices
Date
2005-03-31
Authors
Rosberg, Christian R.
Sukhorukov, Andrey
Krolikowski, Wieslaw
Kivshar, Yuri
Neshev, Dragomir
Journal Title
Journal ISSN
Volume Title
Publisher
Optical Society of America
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.
Description
Keywords
Keywords: Photorefractive materials; Refraction; Lattice depth; Periodic lattices; Spectral bands; Steering properties; Crystal lattices
Citation
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Source
Optics Letters
Type
Journal article