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

I. N. Towers·B. A. Malomed·F. W. Wise
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Abstract

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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I. N. Towers, B. A. Malomed, F. W. Wise. 2003-02-14. Light bullets in quadratic media with normal dispersion at the second harmonic. https://doi.org/10.1103/physrevlett.90.123902

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