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Spontaneously generated X-shaped light bullets

P. Di Trapani·G. Valiulis·A. Piskarskas·O. Jedrkiewicz·J. Trull·C. Conti·S. Trillo
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Abstract

We observe the formation of an intense optical wavepacket fully localized in all dimensions, i.e. both longitudinally (in time) and in the transverse plane, with an extension of a few tens of fsec and microns, respectively. Our measurements show that the self-trapped wave is a X-shaped light bullet spontaneously generated from a standard laser wavepacket via the nonlinear material response (i.e., second-harmonic generation), which extend the soliton concept to a new realm, where the main hump coexists with conical tails which reflect the symmetry of linear dispersion relationship.

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P. Di Trapani, G. Valiulis, A. Piskarskas, O. Jedrkiewicz, J. Trull, C. Conti, S. Trillo. 2003-03-20. Spontaneously generated X-shaped light bullets. https://doi.org/10.1103/physrevlett.91.093904

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