Berlin 2012 – scientific programme
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O: Fachverband Oberflächenphysik
O 74: Plasmonics and nanooptics IV
O 74.1: Talk
Thursday, March 29, 2012, 16:00–16:15, MA 005
The chirp of a surface plasmon polariton probed via plasmon-plasmon interference — •Christoph Lemke1, Till Leißner1, Stephan Jauernik1, Alwin Klick1, Jacek Fiutowski2, Jakob Kjelstrup-Hansen2, Horst-Günter Ruhbahn2, and Michael Bauer1 — 1IEAP, Christian- Albrechts-Universität zu Kiel, 24098 Kiel, Germany — 22Mads Clausen Institute, NanoSYD, University of Southern Denmark, Alsion 2, DK-6400 Sønderborg, Denmark
In an interferometric time-resolved photoemission electron microscopy (ITR-PEEM) experiment, the near-field associated with propagating surface plasmon polaritons (SPP) can be locally sensed via interference with sub 20 fs ultrashort laser pulses [1].
Here, we present ITR-PEEM data of SPP propagation at a gold vacuum interface recorded in a counter-propagating pump-probe geometry. In comparison to former work this approach provides a considerably improved access to the SPP wavepacket dynamics. We exemplify the potential of the scheme by probing the chirp of phase modulated SPPs in a time resolved plasmon-plasmon-interference experiment. Wavepacket simulations quantitatively reproduce the experimental data and allow for a characterization of the phase modulated ultrashort plasmon pulses.
[1] A. Kubo et al., Nano Lett. 7, 470 (2007)