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Regensburg 2007 – scientific programme

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O: Fachverband Oberflächenphysik

O 13: Symposium: Ultrafast Nanooptics II

O 13.3: Invited Talk

Monday, March 26, 2007, 15:15–15:45, H38

Attosecond resolved photoemission from metal surfaces — •Ulrich Heinzmann — University of Bielefeld, Faculty of Physics

The combination of the comb of high harmonics of a phase-stabilized ultrashort laser pulse focussed into a rare gas atomic beam1 with an optimized multilayer mirror system as soft x-ray monochromator2 yields isolated soft x-ray pulses of 250 and less attoseconds duration3. Thus photoelectron and Auger electron emission processes in atoms have been studied time resolved with a sub-fs time resolution4. The report discusses the efforts to apply these techniques in attosecond time resolved photoemission of condensed matter. It presents very first results of attosecond resolved photoelectron emission spectroscopy from a single crystal5 and discusses what can be learned about the electronic dynamics in the bands of the surface and of the few atomic bulk layers the photoelectrons come from.
[1] R. Kienberger et al. Nature 427, 817 (2004)

[2] A. Wonisch et al. Applied Optics 45, 4147 (2006)

[3] E. Goulielmakis et al. Science 305, 1267 (2004)

[4] M. Drescher et al. Nature 419, 803 (2002)

[5] A. Cavalieri et al. to be published (2007)

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