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 nonconventional, 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.
CitationLobanov, V.; Kartashov, Y.; Torner, L. Light bullets by synthetic diffraction-dispersion matching. "Physical review letters", 03 Juliol 2010, vol. 105, núm. 3, p. 1-4.
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