Spin qubits in silicon carbide (SiC) are promising systems for scalable applications in quantum computing and communication thanks to the wafer-scale availability and CMOS compatible fabrication technologies. Among these, silicon vacancies (VSi) in 4H-SiC stand out due to demonstrated high-fidelity multi-qubit gates and preserved spin-optical properties when integrated into nanophotonic waveguides and resonators. In this work, we combine study of the intrinsic spin dynamics and nanofabrication engineering efforts for advancing VSi spin qubits in SiC towards scalable integrated quantum photonics. We infer all the relevant decay rates for estimation of minimum required Purcell factor for strong emitter-cavity coupling. With direct tapered waveguide-to-fiber coupling in cryogenic environment, we show the efficient extraction of light from the system. We also report latest progress on SiC-based Fabry Perót cavities which potentially offer a compact full scalable solution.
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