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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 24: Poster Session I
CPP 24.32: Poster
Montag, 16. März 2020, 17:30–19:30, P3
Dispersion Relations of Metal/Organic Hybrid Structures caused by Strong Coupling between Plasmons and Excitons — •Maximilian Rudloff1, Maximilian Rödel1, Thomas Stark2, Jochen Manara2, and Jens Pflaum1,2 — 1Experimental Physics VI, Julius Maximilian University of Würzburg, 97074 Würzburg — 2Bavarian Center for Applied Energy Research (ZAE Bayern), 97074 Würzburg
Light-matter interaction in the vicinity of a metal surface is an intensely researched topic motivated by the possibility of tuning the optical properties of thin film devices on sub-wavelength scales [1]. By extending this concept to organic semiconductors on top of a metal surface, new hybrid states appear, labelled plexcitons. In our contribution we analyze the dispersion relations of plexcitons emerging by the coupling of localized excitons in ZnPc molecular layers and the collective electronic excitations at gold surfaces by means of a surface plasmon resonance setup. The resulting coupling strength is in the order of ≈100 meV and is interpreted by the characteristics inherent to the individual systems. In addition we discuss the influence of the morphology on the plexcitonic dispersion branches, which provides an additional degree of freedom upon implementing this concept in future opto-electronic devices.
[1] V. Kolb, Opt. Express 25 (2017) 6678