Controlled plasmon-enhanced fluorescence by spherical microcavity*

A surrounding electromagnetic environment can engineer spontaneous emissions from quantum emitters through the Purcell effect. For instance, a plasmonic antenna efficiently confine an field and enhance fluorescent process. In this study, we demonstrate that photonic microcavity modulate plasmon-enhanced fluorescence by engineering local environment. Consequently, constructed emitter (PE-emitter), which comprised nanorod nanodiamond, using nanomanipulation technique. Furthermore, controlled polystyrene sphere approaching PE-emitter investigated in situ associated spectrum lifetime. The emission of be enhanced resonantly at modes as compared to within free spectral range. shape modulated is independent separation between PS PE-emitter. band integral decay rate or suppressed after couples PE-emitters, depending on coupling strength cavity. These findings utilized sensing imaging applications.