The interplay between localized and propagating plasmonic excitations tracked in space and time.
In this work, the mutual coupling and coherent interaction of propagating and localized surface plasmons within a model-type plasmonic assembly is experimentally demonstrated, imaged, and analyzed. Using interferometric time-resolved photoemission electron microscopy the interplay between ultrashort surface plasmon polariton wave packets and plasmonic nanoantennas is monitored on subfemtosecond time scales. The data reveal real-time insights into dispersion and localization of electromagnetic fields as governed by the elementary modes determining the functionality of plasmonic operation units.
Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel , Leibnizstraße 19, D-24118 Kiel, Germany.
Christoph
C
Lemke
Till
T
Leissner
Andrey
A
Evlyukhin
Jörn W
JW
Radke
Alwin
A
Klick
Jacek
J
Fiutowski
Jakob
J
Kjelstrup-Hansen
Horst-Günter
HG
Rubahn
Boris N
BN
Chichkov
Carsten
C
Reinhardt
Michael
M
Bauer