Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 63: Plasmonics and Nanooptics V
O 63.6: Vortrag
Donnerstag, 14. März 2013, 11:45–12:00, H38
Ultrafast strong-field photoemission from plasmonic nanoparticles — •Péter Dombi1,2, Anton Hörl3, Péter Rácz1, István Márton1, Andreas Trügler3, Joachim Krenn3, and Ulrich Hohenester3 — 1Wigner Research Centre for Physics, Budapest, Hungary — 2Max-Planck-Institut für Quantenoptik, Garching — 3Institut für Physik, Karl-Franzens-Universität, Graz, Austria
We demonstrate strong-field electron emission from various plasmonic nanoparticles induced by ultrashort laser pulses. Significant electric field enhancement attributed to surface plasmons enable the experimental generation of up to 25-eV electrons in nano-localized fields around nanoparticles even at low exciting laser intensities. Clear correlation between the plasmonic resonance features of various nanoparticles and photoemission electron spectra are shown. The strong-field plasmonic photoemission and photoacceleration mechanisms involved are confirmed by numerical simulations.