Suppression of fluorescence quenching and strong-coupling in plasmonic nanocavities

Fluorescence emission of a quantum emitter is dominated by its optical environment, and it was proven that an emitter is quenched when it is placed too closed to metal nanoparticles. Here, we present the spatio-temporal dynamics of the emitter and demonstrate that quenching can in fact be suppressed in plasmonic nanocavities. By varying the lateral position of an emitter through DNA-origami technique, our results are confirmed with experimental measurements.