Stuttgart 2012 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 18: Attosecond physics I
A 18.2: Hauptvortrag
Dienstag, 13. März 2012, 14:30–15:00, V47.03
Attosecond dynamics in laser-driver metal clusters — Johannes Passig1, Sergey Zherebtsov2, Robert Irsig1, Slawomir Skruszewicz1, Josef Tiggesbäumker1, Matthias Kling2, Karl-Heinz Meiwes-Broer1, and •Thomas Fennel1 — 1University of Rostock, 18051 Rostock, Germany — 2Max Planck Institute of Quantum Optics, 85748 Garching, Germany
Clusters in intense laser pulses are valuable systems to illuminate strong-field many-particle physics in the attosecond domain [1]. The understanding of key processes like collective excitations, ultrafast plasma creation, and electron rescattering in clusters may open up new routes for the analysis and control of nanosystems with light [2].
The extreme resonant field enhancement in clusters allows the acceleration of electrons to energies of a few hundred times the ponderpomotive potential in a single rescattering process [3]. In pump-probe experiments on silver cluster we found that the emission direction of electrons can be precisely controlled by the relative phase of a two-color laser field up to the keV energy range. A molecular dynamics analysis reveals that the asymmetric acceleration results from the attosecond timing of the induced polarization fields, demonstrating the opportunity of precise and highly efficient control of sub-cycle electron dynamics in resonant plasmonic many-particle systems.
[1] Th. Fennel et al., Rev. Mod. Phys. 82:1793 (2010)
[2] J. Köhn, Phys. Chem. Chem. Phys. 13:8747-8754 (2011)
[3] Th. Fennel et al., Phys. Rev. Lett. 98:143401 (2007)