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Plasmonic trapping for quantum emitters. (a) Schematic of the AgNW-fiber nanofocusing probe for plasmonic trapping of NV-FNDs at the probe tip. The FND has radiative channels into the free space (decay rate Γr) and the SPP waveguide (decay rate ΓSPP). The bottom panel shows the tightly confined SPP. (b) False-colored SEM image of the AgNW (green) and trapped FND (red). (c) A representative PL spectrum from a trapped FND, measured through the free-space radiation channel.
