Fluorescence enhancement and strong-coupling in faceted plasmonic nanocavities

摘要: Emission properties of a quantum emitter can be significantly modified inside nanometre-sized gaps between two plasmonic nanostructures. This forms nanoscopic optical cavity which allows single-molecule detection and strong-coupling at room temperature. However, resonances nanocavity are highly sensitive to the exact gap morphology. In this article, we shed light on effect morphology faceted nanoparticle-on-mirror (NPoM) their interaction with emitters. We find that increasing facet width NPoM provides weaker field enhancement thus less coupling strength single since effective mode volume increases width. if multiple emitters present, is capable accommodating larger number emitters, hence overall due collective coherent energy exchange from all Our findings pave way more efficient designs nanocavities for room-temperature light-matter strong-coupling, providing big step forward non-cryogenic platform technologies.