Sensing electric currents using a quantum diamond microscope

Nitrogen-vacancy (NV) defects in diamond have demonstrated unique capabilities in sensing the magnetic, electric, and stress fields. These capabilities are vested to the NV center by its atomic size, long spin coherence time, and diamond's robust environment. Previous studies have shown the applicability of NV ensembles to wide-field magnetic imaging of a wide range of physical and biological samples under ambient conditions. In this work, we employ the ensemble of NVs in a widefield setup to map the vector magnetic fields generated by the electric currents. The end goal of this work is to implement the non-invasive imaging of magnetic fields generated by the electric currents in electronic devices. Here we present the underlying theory, our approach, preliminary experimental results, and our future work.