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Q: Quantenoptik und Photonik
Q 42: Ultrakurze Lichtimpulse: Carrier-Envelope-Phase
Q 42.4: Talk
Thursday, March 25, 2004, 17:15–17:30, HS 223
Measurement of the absolute phase of few-cycle laser pulses — •Fabrizio Lindner1, M. G. Schätzel1, G.G. Paulus1,2,3, H. Walther1,2, A. Baltuska4, E. Goulielmakis4, M. Lezius4,5, and F. Krausz1,4 — 1Max-Planck-Institut für Quantenoptik, D 85748 Garching, Germany — 2Ludwig-Maximiliams-Universität München, D 85748 Garching, Germany — 3Texas A&M University, Department of Physics, College Station, TX 77843-4242, USA — 4Institut für Photonik, Technische Universität Wien, A 1040 Wien, Austria — 5Institut für Ionenphysik, Universität Innsbruck, A 6020 Innsbruck, Austria
We present experiments of photoionization of rare gases conducted with phase-stabilized few-cycle laser pulses. The detected asymmetry of electron emission in the two polarization directions (stereo-ATI) allowed for the first time the unambiguous determination of the absolute phase of the pulse [1] and its spatial variation along the laser focus (Gouy phase, [2]).
Besides the use of the ATI-phasemeter as an essential tool for experiments requiring long-term phase stability, more fundamental aspects of the ionization process will be discussed. In particular, the electrons’ motion under the driving laser field can be reconstructed with unprecedented attosecond resolution.
[1] Phys. Rev. Lett., in press
[2] Phys. Rev. Lett., submitted