Light bullets by synthetic diffraction-dispersion matching

Details Light bullets by synthetic diffraction-dispersion matching Light bullets by synthetic diffraction-dispersion matching

2010-06-14

arxiv.org/abs/1006.2817v1

Physical Review Letters 105, 033901 (2010)

Physics

Optics

13 pages, 4 figures, to appear in Physical Review Letters

Scientific paper

We put forward a new approach to generate stable, fully three-dimensional light bullets, which is based on the matching of the intrinsic material dispersion with a suitable effective diffraction. The matching is achieved in adequate waveguide arrays whose refractive index is periodically modulated along the direction of light propagation. We show that by using non-conventional, out-of-phase longitudinal modulation of the refractive index of neighboring channels, it is possible to tune the effective diffraction to match the intrinsic material group velocity dispersion. Three-dimensional light bullets are shown to form at reduced energy levels, in settings where the dispersion would be far too weak to generate bullets in the absence of array.

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