SAMOP 2023 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 20: Poster II

A 20.10: Poster

Mittwoch, 8. März 2023, 16:30–19:00, Empore Lichthof

Fragmentation of CH4 in shaped laser fields — •Weiyu Zhang, David Chicharro Vacas, Thomas Pfeifer, and Robert Moshammer — Saupfercheckweg 1, 69117 Heidelberg

Ultrashort laser pulses are widely used to probe the dynamics of atoms and molecules. An intuitive and accessible way to control the laser pulses is always wanted. Limited by the electronic speed, temporal pulse shaping cannot be applied directly. Here, with the spatial liquid modulator, we exhibit one flexible and reliable way to compress and shape pulse. In this talk, the spectral Fourier setup will be introduced. Within the freedom to give and change pulse through amplitude, phase, and polarization, it is possible to better resolve dynamics. Here, we combine the pulse shaper with the Reaction Microscope (REMI) to carry out the real-time pump-probe measurement for methane. Spatially, the methane molecule is a regular tetrahedron structure, which can be distorted by the external laser field and to is dissociated. Different ionization and dissociation channels are compared and analyzed.