Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 23: Plasmonics and Nanooptics: Light-Matter Interaction, Spectroscopy
O 23.1: Poster
Montag, 7. März 2016, 18:15–20:30, Poster E
Time of flight momentum microscopy of plasmon assisted photoemission — •Martin Lehr1, Karina Bley2, Nicolas Vogel2, Gerd Schönhense1, and Hans Joachim Elmers1 — 1Institut für Physik, Johannes Gutenberg-Universität Mainz, 55122 Mainz — 2Friedrich-Alexander University Erlangen-Nürnberg, 91058 Erlangen
The photoemission properties of a Au nano triangular array have been investigated using a time-of-flight-momentum microscope (ToF-PEEM), equipped with a state-of-the-art Surface Concept delay line detector (DLD). The nano triangular array has been fabricated by deposition of a gold film on a self-assembled colloidal sphere structure. The triangles can be resonantly excited by Ti:sapphire femtosecond laser pulses. The sample is illuminated from the backside at normal incidence. We have studied the photoemission intensity as a function of kinetic energy and parallel momentum. Both dependencies deviate from results obtained for flat surfaces.