Hyperfine level structure in nitrogen-vacancy centers near the ground-state level anticrossing

Abstract

Energy levels of nitrogen-vacancy centers in diamond were investigated using optically detected magnetic-resonance spectroscopy near the electronic ground-state level anticrossing (GSLAC) at an axial magnetic field around 102.4~mT in diamond samples with a nitrogen concentration of 1~ppm and 200~ppm. By applying radiowaves in the frequency ranges from 0 to 40 MHz and from 5.6 to 5.9 GHz, we observed transitions that involve energy levels mixed by the hyperfine interaction. We developed a theoretical model that describes the level mixing, transition energies, and transition strengths between the ground-state sublevels, including the coupling to the nuclear spin of the NV center\textquotesingle s ${}^{14}$N and ${}^{13}$C atoms. The calculations were combined with the experimental results by fitting the ODMR spectral lines based on a theoretical model, which yielded information about the polarization of nuclear spins. This study is important for the optimization of experimental conditions in GSLAC-based applications, e.g., microwave-free magnetometry and microwave-free nuclear-magnetic-resonance probes.

arXiv commentSignificant changes from v2: 1) Reinserted treatment of high-density (200ppm) sample; 2) updated paper to version accepted for publication

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Cited by in corpus (15)

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• Dynamic ${}^{14}\mathrm{N}$ nuclear spin polarization in nitrogen-vacancy centers in diamond
• Cross-relaxation studies with optically detected magnetic resonances in nitrogen-vacancy centers in diamond in an external magnetic field
• Interplay between charge and spin noise in the near-surface theory of decoherence and relaxation of $C_{3v}$ symmetry qutrit spin-1 centers
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• Theory of spin center sensing of diffusion
• Electrical readout microwave-free sensing with diamond
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• Quantum diamond microscopy of individual vaterite microspheres containing magnetite nanoparticles
• Quantum simulation of spin-1/2 XYZ model using solid-state spin centers
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