We observe the formation of an intense optical wave packet fully localized in all dimensions,
ie, both longitudinally (in time) and in the transverse plane, with an extension of a few tens of …

We study Bessel X waves with cone dispersion propagating in free space and dispersive
media. Their propagation features find simple explanation when viewed as cylindrically …

A family of dispersionless and diffractionless spatial-temporal Gauss-Laguerre waves
propagating in dispersive linear and transparent media is introduced. Contrary to pulsed …

Plane waves in Kerr media spontaneously generate paraxial X-waves (ie, nondispersive
and nondiffractive pulsed beams) that get amplified along propagation. This effect can be …

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X waves, spatiotemporal generalization of the monochromatic Bessel-(or Durnin-) type
beams, are known in linear acoustic, microwave and optics for their unique property of …

The process of optical frequency doubling in the undepleted regime can lead to the
generation of an X-wave envelope with group velocity locked to the pump beam. Its …

It is revealed that simultaneous suppression of temporal and spatial spread of optical wave
packets, which are free of angular dispersion can be achieved by linear parametric …

We predict that an ultra-cold Bose gas in an optical lattice can give rise to a new form of
condensation, namely matter X waves. These are non-spreading 3D wave-packets which …

The space-time focusing of a (continuous) succession of localized X-shaped pulses is
obtained by suitably integrating over their speed, ie, over their axicon angle, thus …