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Ultrafast strong-field photoemission from plasmonic nanoparticles.

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.

SUBMITTER: Dombi P

PROVIDER: S-EPMC3573732 | biostudies-literature | 2013 Feb

REPOSITORIES: biostudies-literature

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Ultrafast strong-field photoemission from plasmonic nanoparticles.

Dombi Péter P Hörl Anton A Rácz Péter P Márton István I Trügler Andreas A Krenn Joachim R JR Hohenester Ulrich U

Nano letters 20130125 2

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 ...[more]

PMID: 23339740

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