SKM 2023 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 5: 2D Materials I (joint session HL/CPP)
CPP 5.3: Vortrag
Montag, 27. März 2023, 10:00–10:15, POT 81
Strong coupling of excitons in a WS2-monolayer coupled to a silver nanogroove array — •Yuhao Zhang1, Hans-Joachim Schill1,2, Stephan Irsen2, and Stefan Linden1 — 1Physikalisches Institut, Universität Bonn — 2Center of Advanced European Studies and Research (caesar)
In this work, we report on room-temperature interaction of a WS2 monolayer with a tapered nanogroove array milled into monocrystalline silver flake. The bare nanogroove array features three polariton branches resulting from the coupling of localized surface plasmon modes (LSPR) in the nanogrooves and propagation surface plasmon modes (SPP). The linewidth of the lower plasmon polariton branch critically depends on the geometry of the nanogrooves. When a WS2 monolayer is deposited on the nanogroove array with optimized damping, the reflection spectra show an avoided crossing of the exciton mode and the lower plasmon polariton branch with a Rabi splitting of 38.7 meV indicating strong exciton-plasmon polariton coupling.