Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 61: Ultrashort Laser Pulses: Applications IV
Q 61.5: Vortrag
Freitag, 12. März 2010, 11:30–11:45, F 342
Carrier-envelope phase-dependent electron emission from isolated, size-selected SiO2 nanoparticles — •Jürgen Plenge1, Egill Antonsson1, Burkhard Langer1, Christina Graf1, Sergey Zherebtsov2, Irina Znakovskaya2, Izhar Ahmad2, Adrian Wirth2, Oliver Herrwerth2, Sergei Trushin2, Volodymyr Pervak2, Stefan Karsch2, Mark Stockman2, Ferenc Krausz2, Matthias Kling2, Marc Vrakking3, Thomas Fennel4, and Eckart Rühl1 — 1Institut für Chemie und Biochemie, Freie Universität Berlin, Takustr. 3, 14195 Berlin — 2Max-Planck Insti- tut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching — 3FOM Institute for Atomic and Molecular Physics, Science Park 113, 1098 XG Amsterdam — 4Institut für Physik, Universität Rostock, Universitätsplatz 3, 18051 Rostock
We report on the ionization of isolated, size-selected SiO2 nanoparticles (d = 50 - 250 nm) with intense, phase-stabilized laser pulses (τ < 5 fs). The experiments indicate a significant increase of the cut-off in the electron energy spectra of the SiO2 nanoparticles as compared to xenon atoms for the same laser conditions. The asymmetry of the electron emission along the laser polarization axis shows a pronounced dependence on the carrier-envelope phase of the few-cycle laser field. Model calculations of the electron energy spectra and the emission asymmetry indicate that the high kinetic energy electrons result from electron recollision and rescattering in the enhanced field near the nanoparticle surface, where the penetration depth into the surface is a crucial parameter.