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MO: Fachverband Molekülphysik

MO 6: SYED: Electronic 2D Spectroscopy from Small to Large Systems II

MO 6.3: Hauptvortrag

Montag, 18. März 2013, 15:00–15:30, E 415

Multidimensional XUV-NIR spectroscopy of electronic dynamics in small quantum systems — •Christian Ott, Andreas Kaldun, Kristina Meyer, Philipp Raith, Martin Laux, Alexander Blättermann, Thomas Ding, and Thomas Pfeifer — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

In a recent experimental study [1], we investigated the two-electron system helium using nonlinear absorption spectroscopy in the XUV. Combining short-pulsed excitation, laser manipulation, a multidimensional parameter space (laser-pulse intensity, temporal delay, photon energy), and high spectral resolution in the XUV (20 meV @ 60 eV) enables us to observe the coupling among several doubly-excited states where both electrons are active. We show how the spectroscopic analysis of these couplings can be understood and how the electronic wavefunction can be manipulated using ultrashort laser pulses. Towards the study of fundamental multi-electron processes with increasing complexity, possible routes to measuring atoms with more than two electrons will also be discussed.

[1] C. Ott et al., arXiv:1205.0519 (2012)