Mapping surface plasmon polariton propagation via counter-propagating light pulses.
In an interferometric time-resolved photoemission electron microscopy (ITR-PEEM) experiment, the near-field associated with surface plasmon polaritons (SPP) can be locally sensed via interference with ultrashort laser pulses. 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 very intuitive real-time access to the SPP wave packet. The quantitative analysis of the PEEM data enables us to determine in a rather direct manner the propagation characteristics of the SPP.
Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany. lemke@physik.uni-kiel.de
Christoph
C
Lemke
Till
T
Leißner
Stephan
S
Jauernik
Alwin
A
Klick
Jacek
J
Fiutowski
Jakob
J
Kjelstrup-Hansen
Horst-Günter
HG
Rubahn
Michael
M
Bauer