Nature of spatiotemporal light bullets in bulk kerr media

D. Majus, G. Tamošauskas, I. Gražulevičiute, N. Garejev, A. Lotti, A. Couairon, D. Faccio, A. Dubietis

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Abstract

We present a detailed experimental investigation which uncovers the nature of light bullets generated from self-focusing in a bulk dielectric medium with Kerr nonlinearity in the anomalous group velocity dispersion regime. By high dynamic range measurements of three-dimensional intensity profiles, we demonstrate that the light bullets consist of a sharply localized high-intensity core, which carries the self-compressed pulse and contains approximately 25% of the total energy, and a ring-shaped spatiotemporal periphery. Subdiffractive propagation along with dispersive broadening of the light bullets in free space after they exit the nonlinear medium indicate a strong space-time coupling within the bullet. This finding is confirmed by measurements of a spatiotemporal energy density flux that exhibits the same features as a stationary, polychromatic Bessel beam, thus highlighting the nature of the light bullets.

Original languageEnglish
Article number193901
JournalPhysical Review Letters
Volume112
Issue number19
DOIs
Publication statusPublished - 12 May 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Majus, D., Tamošauskas, G., Gražulevičiute, I., Garejev, N., Lotti, A., Couairon, A., Faccio, D., & Dubietis, A. (2014). Nature of spatiotemporal light bullets in bulk kerr media. Physical Review Letters, 112(19), [193901]. https://doi.org/10.1103/PhysRevLett.112.193901