Measurement of ultrafast ionization dynamics of gases by multipulse interferometric frequency-resolved optical gating
Abbreviated Journal Title
Phys. Rev. Lett.
MULTIPHOTON IONIZATION; HARMONIC-GENERATION; PULSES; INTENSITY; PHASE; AIR; Physics, Multidisciplinary
Ultrafast ionization dynamics of femtosecond laser-irradiated noble and simple diatomic gases were studied using a novel two-color time-domain technique which eliminated significant complications seen in past experiments. Ultrafast depletion of the probing laser pulse was observed strictly coincident with the ionization front and attributed to a previously unobserved nonlinear frequency mixing via the transverse plasma current [F. Brunel, J. Opt. Soc. Am. B 7, 52 (1990)]. Good quantitative agreement of the measured single-atom ionization rates with Ammosov-Delone-Krainov rates was found, except for O-2 which showed a 200x smaller rate.
Physical Review Letters
"Measurement of ultrafast ionization dynamics of gases by multipulse interferometric frequency-resolved optical gating" (2001). Faculty Bibliography 2000s. 2951.