Rapid determination of single substitutional nitrogen Ns0 concentration in diamond from UV-Vis spectroscopy

Single substitutional nitrogen atoms [Formula: see text] are the prerequisite to create nitrogen-vacancy (NV) centers in diamonds. They not only serve as electron donors desired NV ? center and provide charge stability against photo-ionisation but also main source of decoherence. Therefore, precise quick determination concentration is a key advantage multitude NV-related research terms material improvement well applications. Here, we present method determine based on absorption spectroscopy UV-Visible range fitting 270 nm band. has experimental simplicity widespread availability that bear advantages over established methods. It allows rapid densities, even for large numbers samples. Our shows further determining low concentrations ability measure locally, which highly relevant diamonds with largely varying single crystal. A cross-check paramagnetic resonance high reliability our yields cross section band cm ?1 ppm (in common logarithm) or natural logarithm), serves reference makes applicable others without need known text]-reference sample calibration. We rapid, practical, replicable pathway independent machine used can be widely implemented standard characterization concentrations.