Light bullets in quadratic media with normal dispersion at the second harmonic

Details Light bullets in quadratic media with normal dispersion at the second harmonic Light bullets in quadratic media with normal dispersion at the second harmonic

2003-02-14

arxiv.org/abs/nlin/0302035v1

Nonlinear Sciences

Pattern Formation and Solitons

4 pages, 5 figures, accepted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.90.123902

Stable two- and three-dimensional spatiotemporal solitons (STSs) in second-harmonic-generating media are found in the case of normal dispersion at the second harmonic (SH). This result, surprising from the theoretical viewpoint, opens a way for experimental realization of STSs. An analytical estimate for the existence of STSs is derived, and full results, including a complete stability diagram, are obtained in a numerical form. STSs withstand not only the normal SH dispersion, but also finite walk-off between the harmonics, and readily self-trap from a Gaussian pulse launched at the fundamental frequency.

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