Evolution of a femtosecond laser-induced plasma and energy transfer processes in a SiO2 microvolume detected by the third harmonic generation technique

Gordienko, V. M.; Potemkin, F. V.; Mikheev, P. M.
October 2009
JETP Letters;Oct2009, Vol. 90 Issue 4, p263
Academic Journal
A nonlinear optical method has been proposed for probing the evolution of a plasma and energy transfer processes in the microvolume of a transparent dielectric using the third-harmonic probe signal. The electron self-trapping time has been estimated as t = 150 ± 80 fs. A decrease in the third-harmonic probe signal has been detected at the picosecond time scale; this decrease can be attributed to a change in the third-order susceptibility χ(3) of a fused silica sample modified by laser radiation.


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