  Generation of an ultra-bright, deterministic, solid-state single photon
source with high photon collection rate is an imperative requirement for
quantum technologies. In this direction, various nanophotonic systems coupled
with single quantum emitters are being implemented, but results in low decay
rate enhancement and MHz photon collection rate. Here, we unravel coherent
superposition of excited Mie-scattering moments in a dipolar antenna, coupled
with a single nitrogen-vacancy (NV-) center, to achieve bright single photon
source with GHz collection rate. Such balancing of Mie-scattering moments,
especially higher-order multi-polar moments, provide strong forward light
scattering with null backward scattering at the generalized Kerker condition.
This results in strong field intensity localization that can be used to shape
the emission from an embedded NV- center in the dipolar antenna. A relative
decay rate enhancement of more than 300 times with collection efficiency
exceeding 75% is achieved that result in photon collection rate of ~ 5 GHz. The
calculated intensity-intensity correlation confirms bright single photon
emission with enhanced rate and collection efficiency.
