  Solid-state quantum emitters are essential sources of single photons, and
enhancing their emission rates is of paramount importance for applications in
quantum communications, computing, and metrology. One approach is to couple
quantum emitters with resonant photonic nanostructures, where the emission rate
is enhanced due to the Purcell effect. Dielectric nanoantennas are promising as
they provide strong emission enhancement compared to plasmonic ones, which
suffer from high Ohmic loss. Here, we designed and fabricated a dielectric Fano
resonator based on a pair of silicon (Si) ellipses and a disk, which supports
the mode hybridization between quasi-bound-states-in-the-continuum (quasi-BIC)
and Mie resonance. We demonstrated the performance of the developed resonant
system by interfacing it with single photon emitters (SPEs) based on
nitrogen-vacancy (NV-) centers in nanodiamonds (NDs). We observed that the
interfaced emitters have a Purcell enhancement factor of ~10, with sub-ns
emission lifetime and a polarization contrast of 9. Our results indicate a
promising method for developing efficient and compact single-photon sources for
integrated quantum photonics applications.
