Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 34: Plasmonics and nanooptics: Light-matter interaction, spectroscopy III
O 34.5: Vortrag
Dienstag, 13. März 2018, 15:00–15:15, MA 041
Spectral shift and spectral broadening of broadband surface plasmon polaritons monitored in real-time during propagation — •Malte Großmann1, Paul Bittorf1, Alwin Klick1, Arkadiusz J. Goszczak2, Jacek Fiutowski2, Horst-Günter Rubahn2, and Michael Bauer1 — 1Institute for Experimental and Applied Physics, University of Kiel, Kiel, Germany — 2Mads Clausen Institute, NanoSYD, University of Southern Denmark, Sonderborg, Denmark
Interferometric time-resolved two-photon photoemission electron microscopy in a normal incidence configuration is used to monitor changes in the spectral distribution of a near-infrared broadband surface plasmon polariton (SPP) pulse as it propagates within 120 fs along a gold-vacuum interface. Next to a red-shift in the central frequency of the SPP pulse clear indications of spectral broadening are observed. The data are interpreted in terms of dispersive plasmon damping as qualitatively confirmed by numerical modeling of SPP propagation along a rough gold surface under consideration of ohmic losses and radiation damping.