Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 74: Plasmonics and nanooptics IV
O 74.5: Vortrag
Donnerstag, 29. März 2012, 17:00–17:15, MA 005
Organic nanofibers as waveguides and emitters of surface plasmon polaritons — •Till Leißner1, Jacek Fiutowski2, Christoph Lemke1, Kasper Thilsing-Hansen2, Stephan Jauernik1, Alwin Klick1, Jakob Kjelstrup-Hansen2, Michael Bauer1, and Horst-Günter Rubahn2 — 1IEAP, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany — 2Mads Clausen Institute, NanoSYD, University of Southern Denmark, Alsion 2, DK-6400 Sønderborg, Denmark
Surface plasmon polariton (SPP) excitation and propagation at gold films as governed by the presence of organic nanofibers composed of self-assembled para-Hexaphenylene (p6P) molecules is studied using interferometric time-resolved photoemission electron microscopy (ITR-PEEM). Two different SPP modes are identified in the experiment: a) the nanofibers act as superior sources for the emission of SPPs at the gold-vacuum interface [1]; b) along the interface between nanofiber and goldfilm we observe 1-d SPP waveguiding as recently also reported by Radko et al. [2]. A quantitative analysis of the data enables us to determine critical SPP propagation parameters such as damping length and group velocity. The results are compared with model simulations based on Hugyens principle and the effective index method [3].
[1] T. Leißner et al., Plasmonics, accepted, [2] Radko et al., Opt. Ex. 19, 16 (2011), [3] Holmgaard and Bozhevolnyi, Phys. Rev. B 75, 245405 (2007)