Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 34: Poster Session I (Graphene; Plasmonics and nanooptics; Coherence and coherent control in nanophotonics and plasmonics)
O 34.56: Poster
Dienstag, 27. März 2012, 18:15–21:45, Poster E
Interaction of Light and Surface Plasmon Polaritons in Ag Islands Studied by Nonlinear Photoemission Microscopy — Philip Kahl, •Simone Wall, Niemma Buckanie, Pierre Kirschbaum, Simon Sindermann, Michael Horn-von Hoegen, and Frank-J. Meyer zu Heringdorf — Faculty of Physics and Center of Nanointegration Duisburg-Essen (CeNIDE), Universität Duisburg-Essen, Lotharstrasse. 1, 47057 Duisburg
Two Photon Photoemission Microscopy was used to study the interaction of femtosecond laser pulses with Ag islands on Si(111) and SiO2. The fs laser pulses initiate surface plasmon polariton (SPP) waves at the edges of the island. The superposition of the electrical fields of the fs laser pulses with the electrical fields of the SPP results in a moiré pattern, the analysis of which gives access to the wavelength and direction of the SPP wave. If the SPPs reach edges of the Ag islands, they may be converted back into light waves. The incident and refracted light waves result in an interference pattern that can again be described with a moiré pattern, showing that Ag islands can be used as plasmonic beam deflectors for light.