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.
FOM Institute for Atomic and Molecular Physics (AMOLF), 1098 XG Amsterdam, The Netherlands.
F
F
Kelkensberg
C
C
Lefebvre
W
W
Siu
O
O
Ghafur
T T
TT
Nguyen-Dang
O
O
Atabek
A
A
Keller
V
V
Serov
P
P
Johnsson
M
M
Swoboda
T
T
Remetter
A
A
L'Huillier
S
S
Zherebtsov
G
G
Sansone
E
E
Benedetti
F
F
Ferrari
M
M
Nisoli
F
F
Lépine
M F
MF
Kling
M J J
MJ
Vrakking