Hamburg 2009 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 22: Attosecond Physics II
A 22.1: Fachvortrag
Mittwoch, 4. März 2009, 16:30–17:00, VMP 8 R208
Attosecond pump-probe electron interferometry — •Kathrin Klünder1, Thomas Remetter1, Marko Swoboda1, Johan Mauritsson1, Anne L'Huillier1, Kenneth J. Schafer2, Freek Kelkenberg3, Wing-Kiu Siu3, Per Johnsson2,3, Marc Vrakking3, Franck Lépine4, Matthias F. Kling5, Irina Znakovskaya5, Thorsten Uphues5, Enrico Benedetti6, Federico Ferrari6, Giuseppe Sansone6, and Mauro Nisoli6 — 1Department of Physics, Lund University, Lund, Sweden — 2Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana, USA — 3FOM Institute for Atomic and Molecular Physics, Amsterdam, The Netherlands — 4Université Lyon 1, CNRS,Villeurbanne, France — 5Max-Planck-Institut für Quantenoptik, Garching, Germany — 6CUSBO, ULTRAS-INFM, Department of Physics, Politecnico, Milano, Italy
We present an interferometric pump-probe experiment to characterize ultrafast bound electron dynamics using isolated attosecond pulses generated from an ultrashort, carrier-envelope-phase stabilized infrared laser with a time-dependent polarization. These attosecond pulses have sufficient photon energy and are broad enough to excite coherently all the p-states in Helium and a fraction of the continuum. The wave packets created in Helium, partly trapped in the atomic potential, are further probed by a 7 fs infrared laser field. From the observed interference between the different ionization pathways we show that it is possible to extract the amplitudes and phase evolutions of the bound, excited states.