Coupling spin defects in hexagonal boron nitride to titanium dioxide ring resonators

Spin-dependent optical transitions are attractive for a plethora of applications in quantum technologies. Here we report on utilization of high quality ring resonators fabricated from TiO2 to enhance the emission from negatively charged boron vacancies (V-B(-)) in hexagonal Boron Nitride. We show that the emission from these defects can efficiently couple into the whispering gallery modes of the ring resonators. Optically coupled V-B(-) showed photoluminescence contrast in optically detected magnetic resonance signals from the hybrid coupled devices. Our results demonstrate a practical method for integration of spin defects in 2D materials with dielectric resonators which is a promising platform for quantum technologies.

Automated summary

This paper reports on the utilization of high quality TiO2 ring resonators to enhance emission from hexagonal boron nitride with negatively charged boron vacancies. The results show that optically coupled defects can efficiently couple into the ring resonators and exhibit photoluminescence contrast in optically detected magnetic resonance signals. This provides a practical method for integrating spin defects in 2D materials, offering a promising platform for quantum technologies.