Berlin 2014 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 53: Ultrashort laser pulses III
Q 53.2: Talk
Thursday, March 20, 2014, 16:45–17:00, DO26 207
Determining the optical response of a nanostructure using carrier-envelope-phase-dependent photoemission — •Michael Krüger1,2, Dominik Hoff3, Georg Wachter4, Lothar Maisenbacher1,2, Michael Förster1,2, Sebastian Thomas1,2, Christoph Lemell4, Joachim Burgdörfer4, A. Max Sayler3, Gerhard G. Paulus3, and Peter Hommelhoff1,2 — 1University Erlangen-Nuremberg, D-91058 Erlangen — 2Max Planck Institute of Quantum Optics, D-85748 Garching bei München — 3Institute for Optics and Quantum Elektronics and Helmholtz Institute Jena, D-07743 Jena — 4Vienna University of Technology, A-1040 Vienna, Austria
The carrier-envelope phase (CEP) dependence of strong-field photoemission is a powerful tool to understand electron dynamics on ångström and attosecond scales. Photoemission from metal nanotips has also been shown to be highly sensitive to the CEP [1]. The solid-state material response leads to a strongly enhanced optical near-field that is phase-shifted with respect to the incident field. Here we present a direct comparison of the CEP dependence of photoemission from atomic xenon and a metal nanotip employing a phase-tagging scheme [2]. We are able to measure the phase shift and hence the full dielectric response of different nanotips, which is of high interest in the field of nano-optics and plasmonics.
[1] M. Krüger, M. Schenk, P. Hommelhoff, Nature 475, 78 (2011).
[2] N. G. Johnson et al., Phys. Rev. A 83, 013412 (2011).