Regensburg 2013 – scientific programme
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O: Fachverband Oberflächenphysik
O 30: Plasmonics and Nanooptics III
O 30.10: Talk
Tuesday, March 12, 2013, 12:45–13:00, H31
Collective spontaneous emission of strongly coupled exciton-surface plasmon polaritons — •Wei Wang1, Parinda Vasa1,2, Robert Pomraenke1, Ralf Vogelgesang1, Margherita Maiuri3, Cristian Manzoni3, Giulio Cerullo3, and Christoph Lienau1 — 1Institut für Physik and Center of Interface Science, Carl von Ossietzky Universität — 2Department of Physics, Indian Institute of Technology Bombay, 400076 Mumbai, India — 3IFN-CNR, Dipartimento di Fisica, Politecnico di Milano, Milano, Italy
We report on the observation of collective spontaneous emission of strongly coupled excitons (Xs) and surface plasmon polaritons (SPPs) in J-aggregate/metal hybrid nanostructures. The optical response of the system is probed at the field level by angle-resolved spectral interferometry. We find that the strong coupling results in a pronounced modification of the radiative damping due to formation of super- and sub-radiant polariton states. Their ultrafast emission dynamics is measured in real time and is well explained within a coupled oscillator model. Such a strong modification of the radiative damping can open up new directions in coherent active plasmonics.