Abstract
Planar metallic nanoholes exhibit plasmonic resonances capable of confining electromagnetic fields down to the nanoscale, which can benefit the light–matter interactions at the nanoscale. In addition, they are more geometrically compatible with state-of-the-art microfabrication techniques in comparison with other types of plasmonic nanostructures of curved surfaces or protrusions. Two-dimensional transition metal dichalcogenides (TMDCs) are promising materials for studying light–matter interactions owing to their excellent optical properties. Herein, we propose a resonance plasmon–exciton coupling system based on the integration of monolayer tungsten disulfide (WS2) with an individual plasmonic gold nanohole. Our results demonstrate that Rabi splitting exceeding 162meV can be achieved in planar TMDC/metal nanostructures at room temperature. We believe that such hybrid systems provide a simple and robust single nanostructure design that can be used to manipulate light–matter interactions at the nanoscale.
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