Dresden 2017 – scientific programme

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O: Fachverband Oberflächenphysik

O 28: Plasmonics and Nanooptics IV: Light-Matter Interaction

O 28.3: Talk

Tuesday, March 21, 2017, 11:00–11:15, TRE Ma

Strong Exciton-Plasmon Coupling on Core-Shell Nanoparticles — •Wouter Koopman, Felix Stete, and Matias Bargheer — Universität Potsdam, Potsdam, Deutschland

Strong-coupling of molecular excitons to localized plasmons in metal nanoparticles offers a new approach for the investigation and utilization of quantum-effects at room temperature. On the other hand, the fabrication of core-shell molecule-metal nanoparticles is possible by well-established, economic wet-chemical methods. Plasmon-exciton coupling could therefore offer an attractive route for the facile implementation of robust, scalable nanoscale quantum systems. This talk will address the presence of strong exciton-plasmon coupling in two simple nanoparticle geometries: core-shell spheres and rods. We will elaborate on the different possible coupling regimes and discuss the pitfalls when one wants to distinguish these experimentally. In particular we show that relying solely on extinction spectrum to classify the coupling regime, as often encountered in literature, can lead to a wrong identification of the regime. In addition, we will address the pronounced dependence of coupling-strength on the particle size and on the dielectric environment and discuss how to use these factors to tailor the coupling.