Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 5: Electron and spin dynamics I
O 5.6: Vortrag
Montag, 22. März 2010, 12:30–12:45, H34
Attosecond photoelectron spectroscopy of solids — •Elisabeth Magerl1, Adrian L. Cavalieri1, Ralph Ernstorfer2, Stefan Neppl2, Nicholas Karpowicz1, Michael Stanislawski1, Elisabeth Bothschafter1, Dietrich Menzel2, Johannes V. Barth2, Peter Feulner2, Ferenc Krausz1,3, and Reinhard Kienberger1,2 — 1Max Planck Institute of Quantum Optics, Garching, Germany — 2Technical University of Munich - E20, E11, Garching, Germany — 3Ludwig Maximilians University, Munich, Germany
The dynamics of the photoelectric effect in single-crystals are investigated on the attosecond time scale. An isolated attosecond XUV-pulse is used to excite photoelectrons, while a few-cycle waveform-controlled NIR-pulse modulates the kinetic energy of the emitted photoelectrons. Recently, applying this streaking technique a relative time delay in emission on the order of 100 attoseconds between electrons originating from different electronic levels in tungsten was already revealed [1].
In order to further study the delay and its possible dependence on material properties and on laser parameters, several streaking measurements on different systems were carried out: We present results obtained on single-crystalline tungsten and rhenium, measured with XUV photon energies of 90 and 130 eV. We also show measurements on a combined system of a single crystal substrate with an adsorbed monolayer of a rare gas.
[1] A. L. Cavalieri et al., Nature 449, 1029 (2007)