Time-resolved double ionization with few cycle laser pulses.
Ionization of D2 launches a vibrational wave packet on the ground state of D+2. Removal of the second electron places a pair of D+ ions onto a Coulombic potential. Measuring the D+ kinetic energy determines the time delay between the first and the second ionization. Caught between a falling ionization and a rapidly rising intensity, the typical lifetime of the D+2 intermediate is less than 5 fs when an intense 8.6 fs laser pulse is used. We simulate Coulomb explosion imaging of the ground state wave function of D2 by a 4 fs optical pulse and compare with our experimental observations.
Légaré
F
F
National Research Council of Canada, Ottawa, Ontario, Canada K1A 0R6.
Litvinyuk
I V
IV
Dooley
P W
PW
Quéré
F
F
Bandrauk
A D
AD
Villeneuve
D M
DM
Corkum
P B
PB