  Solid state quantum emitters are between the most promising candidates for
single photon generation in quantum technologies. However, they suffer from
decoherence effects which limit their efficiency and indistinguishability. For
instance, the radiation emitted in the zero phonon line (ZPL) of most color
centers is on the order of a few percent (e.g. $NV^-$ centers in Diamond,
$V_{Si}V_{C}$ in SiC) limiting the emission rate of single photons as well as
the efficiency. At the same time, reliable interfacing with photons in an
integrated manner still remains a challenge on both diamond and SiC technology.
Here we develop photonic crystal cavities with Q factors in the order of 7,100
in 3C SiC. We discuss how this high confinement cavity can significantly
enhance the fraction of photons emitted in the ZPL and improve their
characteristics. In particular, the increased efficiency and improved
indistinguishability can open the way to quantum technologies in the solid
state.
