Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 41: Plasmonics and Nanooptics IV
O 41.7: Vortrag
Mittwoch, 16. März 2011, 12:45–13:00, WIL A317
Investigating Ag Nanostructures by TOF-PEEM using High Harmonic Radiation — •Soo Hoon Chew1, Frederik Süssmann2, Christian K. Späth1, Alexander Guggenmos2, Yingying Yang2, Jürgen Schmidt1, Adrian Wirth2, Sergey Zherebtsov2, Michael Hofstetter2, Matthias F. Kling2, Mark I. Stockman3, Ferenc Krausz2, and Ulf Kleineberg1 — 1Department of Physics, Ludwig Maximilian University of Munich, Garching, Germany — 2Max Planck Institute of Quantum Optics, Garching, Germany — 3Georgia State University, Altanta, USA
We demonstrate first experimental results on imaging plasmonic nanostructures by Time-of Flight-Photoelectron Emission Microscope (TOF-PEEM) in combination with Extreme Ultraviolet (XUV) attosecond pulses from a High Harmonic Generation source. The 1 kHz coherent attosecond XUV radiation is produced by ionizing neon atoms with waveform-controlled near-infrared (0.6 mJ, 5 fs) laser pulses and spectrally filtered at 93 eV by means of a multilayer mirror. We have characterized various polycrystalline Cu microstructures and Ag nanostructures using these ultrashort XUV pulses by TOF-PEEM with a spatial resolution approaching 100 nm. The electron energy spectrum have been investigated at different sample positions and energy filtering has been applied to improve image resolution. The experiments demonstrate first steps towards the temporal characterization of nanoscaled localized surface plasmon fields in a femtosecond optical-pump/attosecond XUV-probe experiments.