Molecular dissociative ionization and wave-packet dynamics studied using two-color XUV and IR pump-probe spectroscopy.
We present a combined theoretical and experimental study of ultrafast wave-packet dynamics in the dissociative ionization of H_{2} molecules as a result of irradiation with an extreme-ultraviolet (XUV) pulse followed by an infrared (IR) pulse. In experiments where the duration of both the XUV and IR pulses are shorter than the vibrational period of H_{2};{+}, dephasing and rephasing of the vibrational wave packet that is formed in H_{2};{+} upon ionization of the neutral molecule by the XUV pulse is observed. In experiments where the duration of the IR pulse exceeds the vibrational period of H_{2};{+} (15 fs), a pronounced dependence of the H;{+} kinetic energy distribution on XUV-IR delay is observed that can be explained in terms of the adiabatic propagation of the H_{2};{+} wave packet on field-dressed potential energy curves.
Kelkensberg
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F
FOM Institute for Atomic and Molecular Physics (AMOLF), 1098 XG Amsterdam, The Netherlands.
Lefebvre
C
C
Siu
W
W
Ghafur
O
O
Nguyen-Dang
T T
TT
Atabek
O
O
Keller
A
A
Serov
V
V
Johnsson
P
P
Swoboda
M
M
Remetter
T
T
L'Huillier
A
A
Zherebtsov
S
S
Sansone
G
G
Benedetti
E
E
Ferrari
F
F
Nisoli
M
M
Lépine
F
F
Kling
M F
MF
Vrakking
M J J
MJ