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A: Fachverband Atomphysik

A 26: Poster Session II

A 26.17: Poster

Mittwoch, 8. März 2017, 17:00–19:00, P OG1

Combining absorption and photoelectron spectroscopy on ultrashort timescales — •Maximilian Hartmann, Alexander Blättermann, Paul Birk, Veit Stooß, Gergana Borisova, Christian Ott, and Thomas Pfeifer — Max-Planck- Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

Femtosecond laser pulses (1fs = 10⁻¹⁵s) have enabled the study of electron dynamics in atoms, molecules and solids on their natural time scale.

Two techniques for these studies—namely transient absorption spectroscopy (TAS) and photoelectron spectroscopy (PES)—make use of such laser pulses to drive high-harmonic generation in rare gases in order to produce attosecond bursts of XUV radiation for pump probe-type experiments. The two methods are complementary in the sense that TAS is most sensitive to bound state dynamics, while PES has direct access to ionization dynamics.

Using TAS we have studied the evolution and manipulation of inner-valence transitions and autoionizing states in noble gases [C. Ott et al., Science 340, 716 (2013); A. Kaldun et al. Phys. Rev. Lett. 112, 103001 (2014); T.Ding et al., Opt. Lett. 41, 709 (2016)]. Here we present the integration of an electron time-of-flight spectrometer into our setup to be able to perform TAS and PES simultaneously. With this new dual approach we aim to gather complementary information of the electron dynamics in atoms and molecules.