Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 36: Poster Session II (Organic films and electronics, photoorganics; Nanostructures; Plasmonics and nanooptics, Surface chemical reactions and heterogeneous catalysis, Surface dynamics )
O 36.30: Poster
Dienstag, 12. März 2013, 18:15–21:45, Poster B2
Probing the dispersion relation of surface plasmon polaritons by photoemission electron microscopy — •Jörn Willers Radke1, Christoph Lemke1, Till Leißner1, Alwin Klick1, Jacek Fiutowski2, Kasper Thilsing-Hansen2, Luciana Tavares2, Jakob Kjelstrup-Hansen2, Horst-Günter Rubahn2, and Michael Bauer1 — 1Christian-Albrechts-Universität, IEAP, Kiel — 2Syddansk Universitet, MCI, Sønderborg
We implemented two-photon photoemission electron microscopy (2P-PEEM) as a method to experimentally determine real and imaginary part of the dispersion relation of surface plasmon polaritons (SPPs) in the red and near-infrared spectral region. In the experiment a tunable Ti:Sapphire laser system is used for SPP excitation and detection via PEEM following an approach described in [1]. A characteristic periodicity in the photoemission data provide the relevant information on the real part of the SPP dispersion relation, the imaginary part is extracted from the decay length of the SPP signal. The validity of the approach is exemplified by measurements of the dispersion relation of SPPs propagating at the interface between a gold film and homogeneous films of para-hexaphenylene (p6P) at varying thickness. Furthermore, we also present experimental data of the SPP dispersion relation measured for individual dielectric loaded SPP waveguides. The example proofs the capability of this PEEM approach to provide a comprehensive view on SPP propagation properties in the frequency domain as governed by nanoscale objects.
[1] Kubo et al., Nano Lett. 7(2), p. 470 (2007)