Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie im Forschungsverbund Berlin e.V.

2.2 Ultrafast Molecular Dynamics

Project coordinators: A. Rouzée , K. Amini

T2: Strong field processes in few-body systems

Over the past decades, femtosecond nonlinear spectroscopic techniques using optical and infrared laser pulses have established a new paradigm for observing and characterizing photo-induced structural changes in molecules and large biomolecular complexes. Here, we aim to extend these techniques into the VUV and XUV spectral ranges by employing state-of-the-art sources based on high-order harmonic generation and resonant dispersive-wave emission in hollow-core fibers. We aim to track charge flow in molecules on its natural time scale and to visualize how photo-induced electron dynamics couple to subsequent structural transformations.

People involved:

Arnaud Rouzée, Tamas Nagy, Martin Kretschmar, Rostyslav Danylo, Marco Ruberti, Misha Ivanov

Fig.: Time-resolved photoelectron spectrum (TRPES) of C₂D₄ recorded as a function of the time delay between two sub-4-fs VUV (158 nm) pulse replicas generated via resonant dispersive-wave emission in a hollow-core fiber. The oscillations observed in the TRPES arise from vibronic wavepacket motion along the C=C torsional coordinate
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