Accurate characterization of emerging quantum sensors requires an imaging technique that does not depend on defect-specific optical readout. Here, using a NV center in diamond, the authors detect and map boron vacancy defects in hBN via spin cross-relaxation, enabling quantitative nanoscale imaging and spectroscopy without detecting hBN emission.
- Alex L. Melendez
- Ruotian Gong
- Huan Zhao