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Stuttgart 2012 – scientific programme

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A: Fachverband Atomphysik

A 44: Attosecond physics II

A 44.5: Talk

Friday, March 16, 2012, 11:45–12:00, V57.05

Real-time probing of field ionization induced by sub-cycle light transients — •Antoine Moulet1, Adrian Wirth1, Mohammed Tharwat Hassan1, Ivanka Grguraš1, Justin Gagnon1, Tran Trung Luu1, Stefan Pabst3,4, Robin Santra3,4, Zeyad Ahmed Alahmed2, Abdallah Mohammed Azzeer2, Vladislav Yakovlev1,5, Volodymyr Pervak5, Ferenc Krausz1,5, and Eleftherios Goulielmakis11Max-Planck-Institut für Quantenoptik, Garching, Germany — 2King Saud University, Riyadh, Kingdom of Saudi Arabia — 3Center for Free-Electron Laser Science, DESY, Hamburg, Germany — 4Department of Physics, University of Hamburg, Germany — 5Department für Physik, Ludwig-Maximilians-Universität, Garching, Germany

We present the application of field-synthesized sub-cycle pulses (1) to the strong field ionization of atoms and the triggering of valence electron coherent motion in the generated ions. We use attosecond XUV transient absorption spectroscopy (2) to probe the dynamics.

Because with such pulses strong field ionization of krypton atoms can be confined to a single light crest, it creates a valence electron wavepacket with an unprecedented degree of coherence. Dynamic spectral distortions shed light on the instantaneous polarization of the electronic system by a varying electric field, often referred to as AC-Stark shift.

(1) A. Wirth et al., Science 334, 195 (2011)

(2) E. Goulielmakis et al., Nature 466, 739 (2010)

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