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Updated: Jul 16, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
Published on: February 4, 2017
Attosecond strobing of two-surface population dynamics in dissociating H2+
A Staudte1, D Pavicić, S Chelkowski
1Institut für Kernphysik, J.W. Goethe Universität, D-60486 Frankfurt/Main, Germany. andre.staudte@nrc.ca
Abstract:
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.
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