Physics – Optics
Scientific paper
2010-11-06
Physical Review A 82, 033826 (2010)
Physics
Optics
14 pages, 4 figures (14 panels)
Scientific paper
10.1103/PhysRevA.82.033826
Based on numerical simulations, we show that higher-order nonlinear indices (up to $n_8$ and $n_{10}$, respectively) of air and argon have a dominant contribution to both focusing and defocusing in the self-guiding of ultrashort laser pulses over most of the spectrum. Plasma generation and filamentation are therefore decoupled. As a consequence, ultraviolet wavelength may not be the optimal wavelengths for applications requiring to maximize ionization.
Béjot Pierre
Ettoumi Wahb
Faucher Olivier
Hertz Edouard
Kasparian Jérôme
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