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Darmstadt 2008 – scientific programme

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A: Fachverband Atomphysik

A 1: Attosecond electron dynamics

A 1.5: Talk

Monday, March 10, 2008, 15:15–15:30, 3C

Imaging Attosecond Electron Wavepackets Around The Ionization Threshold — •Marko Swoboda1, Thomas Remetter1, Johan Mauritsson1, Anne l’Huillier1, Kenneth J. Schafer2, Freek Kelkensberg3, Wing-Kiu Siu3, Per Johnsson3, Marc J. J. Vrakking3, Matthias F. Kling4, Irina Znakovskaya4, Thorsten Uphues4, Sergey Zherebtsov4, Franck Lépine5, Enrico Benedetti6, Federico Ferrari6, Giuseppe Sansone6, and Mauro Nisoli61Dept. of Physics, LTH, Lund University, P.O. Box 118, 221 00 Lund, Sweden — 2Louisiana State Univ., Baton Rouge, Louisiana 70803-4001, USA — 3AMOLF Institute, P.O.Box 41883, 1009 DB Amsterdam, The Netherlands — 4MPI für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany — 5Univ. Lyon 1; CNRS; LASIM, UMR 5579,43 bvd. du 11 nov. 1918, 69622 Villeurbanne, France — 6CUSBO, ULTRAS-INFM, Politecnico, Piazza Leonardo da Vinci 32, 20133 Milano, Italy

We image the momentum distributions of attosecond electron wavepackets generated from the ionization of Helium by attosecond XUV pulses. Using an infrared probing field, the evolution of these wavepackets can be captured in time and space. Tuning the central frequency of the pulses allows us to initiate a number of processes that originate from the interplay of partially bound and continuum wavepackets or returning electrons and the atomic potential. Using this attosecond pump-probe scheme, we can track electron dynamics around the ionization barrier, performing interferometric measurements of different ionization pathways.

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