Ultrashort laser pulse filamentation from spontaneous X-Wave formation in air.
The description of ultrashort laser pulse filamentation in condensed media as a spontaneous formation of X waves is shown to apply also to filaments generated in air. Within this framework, a simple explanation is brought for several features of the filament such as the subdiffractive propagation and the energy flux from the weakly localized tails of the X-waves to the intense core.
Faccio
Daniele
D
CNISM and Department of Physics and Mathematics, Università dell'Insubria, Via Valleggio 11, IT-22100 Como, Italy. daniele.faccio@uninsubria.it
Averchi
Alessandro
A
Lotti
Antonio
A
Di Trapani
Paolo
P
Couairon
Arnaud
A
Papazoglou
Dimitris
D
Tzortzakis
Stelios
S
D000388:Air; D003198:Computer Simulation; D007834:Lasers; D008962:Models, Theoretical; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D012542:Scattering, Radiation; D012815:Signal Processing, Computer-Assisted; D014965:X-Rays