Peculiarities of optical and ODMR spectra of nitrogen-vacancy color centers in diamond crystals

Abstract

The optical and ODMR spectra of nitrogen vacancy (NV) centers in diamond were investigated as applied to the development of micro-scale diamond magnetometer sensor. It is shown that the NV0 center (unlike the NV- center) has an absorption line in the UV range. The inversion of the zero phonon line of the NV- center was observed and explained. ODMR signals in high magnetic fields (as compared with inner fields in the crystal) as well as in weak fields also were investigated. We propose the solution to the problem of the magnetometer sensitivity reduction at low magnetic field, that is of interest for quantum magnetometry applications.