Erlangen 2022 – scientific programme
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MO: Fachverband Molekülphysik
MO 15: Poster 2
MO 15.15: Poster
Wednesday, March 16, 2022, 16:30–18:30, P
Strong-field effects on singly excited vibronic resonances in the hydrogen molecule — •Paula Barber Belda1, Gergana D. Borisova1, Daniel Fan1, Shuyuan Hu1, Maximilian Hartmann1, Paul Birk1, Alejandro Saenz2, Christian Ott1, and Thomas Pfeifer1 — 1Max-Planck-Insititut für Kernphysik, 69117 Heidelberg, Germany — 2Institut für Physik, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
Studies of the hydrogen molecule and its interaction with ultrashort light pulses allow for the understanding of many quantum molecular phenomena in the simplest possible case of a molecule with only two nuclei and two electrons. In a transient absorption experiment with H2 in the spectral range 13-17eV we drive transitions from the molecular ground state to the electronically excited B, C and D states. The included energy levels of the eigenstates of H2 are calculated numerically, as well as the dipole matrix elements for the considered transitions. We observe intensity-dependent changes in the XUV absorption spectrum in the presence of moderately strong NIR field, coupling different excited states. In a few-level simulation, where we can consciously include and exclude states in the model system, we use numerically calculated energy levels of the eigenstates of H2, as well as dipole matrix elements for the considered transitions. We aim to understand with it the importance of different couplings to the changing absorption lines and the corresponding time-dependent dipole we reconstruct from the measurement.