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O: Fachverband Oberflächenphysik

O 63: Plasmonics and Nanooptics V

O 63.8: Talk

Thursday, March 14, 2013, 12:15–12:30, H38

Strong-field photoemission from nanostructures at mid-infrared frequencies — •Georg Herink, Daniel R. Solli, Sergey V. Yalunin, Lara Wimmer, Katharina Echternkamp, Max Gulde, and Claus Ropers — Materials Physics Institute and Courant Research Centre, University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen

We investigate strong-field photoemission from plasmonic nanotips driven by ultrashort pulses at near-and mid-infrared wavelengths up to 12 µm. Kinetic energies of hundreds of electronvolts, corresponding to more than 1000 times the photon energy, are experimentally observed. The scaling of the cutoff energy with wavelength reveals electron dynamics that arise from acceleration within the enhanced optical near-field [1]. Electron dynamics and scalings exclusive to nanostructures are discussed, and their optical control is described using recent theoretical results.

[1] G. Herink, D. R. Solli, M. Gulde, C. Ropers, Nature 483,190 (2012)