Attosecond strobing of two-surface population dynamics in dissociating H2+.
Using H2+ and D2+, we observe two-surface population dynamics by measuring the kinetic energy of the correlated ions that are created when H2+ (D2+) ionize in short (40-140 fs) and intense (10(14) W/cm2) infrared laser pulses. Experimentally, we find a modulation of the kinetic energy spectrum of the correlated fragments. The spectral progression arises from a hitherto unexpected spatial modulation on the excited state population, revealed by Coulomb explosion. By solving the two-level time-dependent Schrödinger equation, we show that an interference between the net-two-photon and the one-photon transition creates localized electrons which subsequently ionize.
Staudte
A
A
Institut für Kernphysik, J.W. Goethe Universität, D-60486 Frankfurt/Main, Germany. andre.staudte@nrc.ca
Pavicić
D
D
Chelkowski
S
S
Zeidler
D
D
Meckel
M
M
Niikura
H
H
Schöffler
M
M
Schössler
S
S
Ulrich
B
B
Rajeev
P P
PP
Weber
Th
T
Jahnke
T
T
Villeneuve
D M
DM
Bandrauk
A D
AD
Cocke
C L
CL
Corkum
P B
PB
Dörner
R
R