Nonlinear X-wave formation by femtosecond filamentation in Kerr media.

  title={Nonlinear X-wave formation by femtosecond filamentation in Kerr media.},
  author={Arnaud Couairon and Eugenijus Gaizauskas and Daniele Faccio and Audrius Dubietis and Paolo di Trapani},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  volume={73 1 Pt 2},
We investigate the formation of X waves during filamentation in Kerr media. From the standard model developed for femtosecond filamentation in liquids, solids, and gases, the influence of several physical effects and parameters is numerically studied in the strongly nonlinear regime where group velocity dispersion alone is insufficient to arrest collapse. The collapse is shown to be arrested by multiphoton absorption and plasma defocusing, but not by dispersion. The postcollapse dynamics takes… CONTINUE READING