Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 57: Plasmonics and Nanooptics II

O 57.1: Vortrag

Mittwoch, 2. April 2014, 16:00–16:15, GER 38

Controlling the emission and movement of electrons on a nanoscale with few-cycle laser pulses — •Jan Vogelsang, Björn Piglosiewicz, Slawa Schmidt, Doojae Park, Jörg Robin, Petra Groß, and Christoph Lienau — Institut für Physik, Carl von Ossietzky Universität Oldenburg, Germany

Due to their large field enhancement at the apex, metallic nanotapers became a workhorse for studying strong-field effects at solid state surfaces in the last years. Sufficiently high laser electric field strengths exceeding 10 V/nm can be reached without melting the atomic lattice, such that the ocillating laser field becomes comparable or even stronger than the Coulomb field binding the electrons to the nuclei. Since the field enhancement is limited to a volume as small as the taper apex itself, the electrons are influenced by the external electric field only on a potentially nanometersized volume on a time scale given by the laser pulse duration[1].

In this talk, recent results of our group on the direct control of electron emission and acceleration in strong electric fields are discussed[2]. In particular, the influence of the carrier-envelope-phase of the incident laser pulse on the photoelectron spectra will be covered[3].

[1] Herink, G. et al., Nature 483, 190-193 (2012).

[2] Park, D. J. et al., Phys. Rev. Lett. 109, 244803 (2012).

[3] Piglosiewicz, B. et al., Nature Photonics (2013) (doi:10.1038/nphoton.2013.288).