Berlin 2012 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 52: Focussed session: Coherence and coherent control in nanophotonics and plasmonics II

O 52.7: Vortrag

Mittwoch, 28. März 2012, 19:00–19:15, MA 005

Strong field acceleration of attosecond electron pulses emitted by a nanometer-sized gold taper — •Björn Piglosiewicz, Slawa Schmidt, Doojae Park, and Christoph Lienau — Ultraschnelle Nano-Optik, Institut für Physik, Fakultät V, Universität Oldenburg, 26111 Oldenburg, Deutschland

When few-cycle near-IR femtosecond pulses in the range of 1 - 2 microns and with nJ energy are focused onto the nanometer-sized tip of a conical metallic taper, the strong laser field induces the tunneling of electrons out of the very apex of this tip. The ejected electrons are then strongly accelerated within the field gradient near the tip apex and this acceleration results in unusual, plateau-like kinetic energy spectra of the ejected electrons. Here, we analyze for the first time the angle-resolved kinetic energy spectra generated by strong-field photoemission from single gold tips. We show that their dependence on dc-bias and laser wavelength allows us to deduced details of the light-driven electron dynamics on attosecond time and nanometer length scale. Our results might be interesting for electron microscopy with attosecond time resolution.