Ultrafast Strong-Field Photoemission from Plasmonic Nanoparticles
Nano Letters2013Vol. 13(2), pp. 674–678
Citations Over TimeTop 1% of 2013 papers
Péter Dombi, Anton Hörl, Péter Rácz, István Márton, Andreas Trügler, Joachim R. Krenn, Ulrich Hohenester
Abstract
We demonstrate the ultrafast generation of electrons from tailored metallic nanoparticles and unravel the role of plasmonic field enhancement in this process by comparing resonant and off-resonant particles, as well as different particle geometries. We find that electrons become strongly accelerated within the evanescent fields of the plasmonic nanoparticles and escape along straight trajectories with orientations governed by the particle geometry. These results establish plasmonic nanoparticles as versatile ultrafast, nanoscopic sources of electrons.
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