ИСТИНА

The color centers in diamond, unlike organic molecules, are not subject to photobleaching and are therefore ideal candidates for use as single-photon sources operating at room temperature. One of the most studied and interesting of them is the NV center, consisting of nitrogen atom and a lattice vacancy. Localization of single center is possible in a bulk sample using a scanning confocal microscope. An alternative method is based on the use of nanoparticles containing a small discrete number of centers. The nanodiamonds distributed on the substrate relatively rare are similar to a star field and methods developed in astronomy to study a large number of star-like objects can be applied to them. The main tool for such studies is low-noise, high-sensitivity CCD, which allows measuring light fluxes and coordinates with photon accuracy. In this work we demonstrate the application of wide-field spectral and polarization photometry for the characterization and selection of the most optimal objects containing single NV centers.