期刊
NATURE PHOTONICS
卷 3, 期 7, 页码 395-398出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHOTON.2009.95
关键词
-
资金
- Israeli Science Foundation [960/05]
- Israeli Ministry of Science, Culture and Sport
Recently, the first experimental observation of a new class of non-diffracting optical beams that freely accelerate in space was reported(1). These so-called Airy beams were shown to be useful for optical micro-manipulation of small particles(2) and for the generation of curved plasma channels in air(3). To date, these beams have been generated only by using linear diffractive elements. Here, we show a new way of generating Airy beams by using three-wave mixing processes, which occur in asymmetric nonlinear photonic crystals. We experimentally generated a second-harmonic Airy beam and examined the tuning properties of the nonlinear interaction and propagation dynamics of the pump and second-harmonic output beams. This nonlinear generation process enables Airy beams to be obtained at new wavelengths, and opens up new possibilities for all-optical switching and manipulation of Airy beams.
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