  Designing a deterministic, bright, robust, room temperature stable, on-demand
solid-state single photon source has been a major demand in the field of
quantum-photonics. For this, various single-photon resonator and antenna
schemes are being actively explored. Here, using the Cartesian multi-polar
decomposition of the excited Mie-scattering moments, we present the design of a
all-dielectric coupled-dipolar antenna comprising of two dielectric (Tin-oxide,
TiO$_2$) cylinders sandwiching a nanodiamond based nitrogen-vacancy (NV$^-$)
center trapped in a poly-vinyl alcohol (PVA) matrix. The Mie-scattering
resonant cavity formed in the middle PVA layer provides more than an order of
magnitude decay rate or Purcell enhancement. The balancing of the electric and
magnetic dipolar moments (a phenomenon commonly known as the Kerker condition)
of the coupled TiO$_2$ cylinders under NV$^-$ dipole excitation, provides
significant directionality to the radiation pattern. Using a collection lens
with a numerical aperture (NA) of 0.9 the vertical collection efficiency (VCE)
was observed to be around 80\% at the NV$^-$ center's zero-phonon line
wavelength.
