Regensburg 2010 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)
O 59.24: Poster
Mittwoch, 24. März 2010, 17:45–20:30, Poster B1
Characterization of Plasmonic Nanoantennas for Enhanced High Harmonic Generation by 2P-TOF-PEEM — •Soo Hoon Chew1, Adrian Wirth2, Frederik Süßmann2, Nils Weber3, Matthias Escher3, Sergey Zherebtsov2, Jürgen Schmidt1, Michael Hofstetter2, Matthias Kling2, Mark Stockman4, Ferenc Krausz1,2, and Ulf Kleineberg1 — 1Department of Physics, University of Ludwig-Maximilians, Garching, Germany — 2Max Planck Institute of Quantum Optics, Garching, Germany — 3Focus GmbH, Hünstetten Kasselbach, Germany — 4Georgia State University, Altanta, USA
Metallic bowtie nanostructures have recently been demonstrated to enhance high harmonic generation from noble gases attributing to resonant plasmon field enhancement in the vicinity of nanostructures driven by femtosecond laser pulse excitation. Two-photon photoelectron emission microscopy (2P-PEEM) is a powerful tool to image the near field enhancement and "hot spot" photoemission from plasmonic nanostructures. Besides imaging the spatial electron distribution, the photoelectrons kinetic energy distribution within the nanostructures can be mapped using a time-of-flight (TOF) detector coupled to the 2P-PEEM. We have characterized various plasmonic nanoantennas by means of 2P-TOF-PEEM using a ps diode laser. Our ultimate goal is to characterize the nanoplasmonic fields not only on a nm spatial scale but also on ∼100 as temporal scale. Therefore, the concept of as field microscope utilizing a TOF-PEEM in combination with fs optical-pump/as XUV-probe experiment will be discussed.