Key points are not available for this paper at this time.
Magnetometry and magnetic imaging with nitrogen-vacancy (NV) defects in rely on the optical detection of electron spin resonance (ESR). , this technique is inherently limited to magnetic fields that are weak to avoid electron spin mixing. Here we focus on the high off-axis field regime for which spin mixing alters the NV defect spin dynamics. first study in a quantitative manner the dependence of the NV defect optical on the magnetic field vector B. Magnetic-field-dependent-resolved photoluminescence (PL) measurements are compared to a seven-level of the NV defect that accounts for field-induced spin mixing. The model the decreases in (i) ESR contrast, (ii) PL intensity and (iii) level lifetime with an increasing off-axis magnetic field. We next that those effects can be used to perform all-optical magnetic in the high off-axis magnetic field regime. Using a scanning NV defect, we map the stray field of a magnetic hard disk through both PL and lifetime imaging. This all-optical method for high magnetic field at the nanoscale might be of interest in the field of nanomagnetism, samples producing fields in excess of several tens of milliteslas are.
Tetienne et al. (Fri,) studied this question.