Hannover 2020 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Control (joint session MO/Q)
Q 62.3: Vortrag
Freitag, 13. März 2020, 14:30–14:45, f102
Electron-vibrational coupling dynamics in SF6 — •Patrick Rupprecht1, Lennart Aufleger1, Alexander Magunia1, Simon Heinze2, Thomas Ding1, Marc Rebholz1, Stefano Amberg1, Nikola Mollov1, Felix Henrich1, Maurits Haverkort2, Christian Ott1, and Thomas Pfeifer1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Universität Heidelberg, Institut für Theoretische Physik
Visible and infrared vibrational spectroscopy, probing non-localized electronic molecular states, is commonly used in chemistry and biology. In combination with core-level spectroscopy, studies of coherently coupled electronic and vibrational dynamics with site and element specificity are possible. We report on the investigation of sulfur hexafluoride (SF6) using attosecond transient absorption spectroscopy driven by mJ-level, few-cycle 15 fs FWHM pulses centered at 1550 nm in the short-wave infrared (SWIR) spectral region. The excited 6a1g, 2t2g and 4eg molecular states related to the sulfur L2,3 absorption edge were probed. First, altering the absorption spectrum in the 160 eV to 200 eV soft X-ray (SXR) region under the presence of a strong SWIR field was demonstrated. Furthermore, varying the delay between the SXR and SWIR pulses resulted in an oscillatory behavior of the resonance lines’ intensities, with a leading SWIR pulse. The extracted oscillation period of (773 ± 16) cm−1 matches the Raman-active symmetric breathing mode ν1 = 775 cm−1. This result implies sensitivity to nonresonant impulsive stimulated Raman scattering via probing electronic transitions to states localized near the sulfur atom.