Abstract
The spectra of the optically detected magnetic resonance for single NV– centers have been experimentally studied in two solid-state samples in the range of hyperfine interactions between the electron spin and the nitrogen nucleus spin in the same NV– center. This study has been aimed at reaching a maximal microwave frequency resolution in the experimental setup used. For measurements, two low-nitrogen (no higher than 50 ppb) diamond single-crystal samples have been grown. Measured time \(T_{2}^{*}\) of the spin decoherence in NV– centers was about 2 μs in one sample and 20 μs in the other. For both samples, the spectrum of the optically detected magnetic resonance for the hyperfine splitting of a single NV– center and 14N atom has been taken and investigated. The resolution in these samples has been estimated at a level of 3.5 and 0.18 MHz, respectively. It has been noted that the resolution of the spectrum improves with increasing time \(T_{2}^{*}\) of the spin decoherence of the single NV– center.
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ACKNOWLEDGMENTS
The authors thank D.V. Teteruk for sample-1 growth; V.D. Blank for encouraging discussions; and A.N. Tsar’kov, S.V. Smurov, and A.I. Alatartsev for general support.
Samples were grown and prepared in the Center for Collective Use at the Technological Institute for Superhard and Novel Carbon Materials, Troitsk, Moscow.
Funding
This study was financially supported by the Russian Science Foundation, grant no. 21-42-04416.
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Translated by V. Isaakyan
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Kukin, N.S., Muradova, A.P., Nikitin, A.K. et al. Measurement Sensitivity of the Optically Detected Magnetic Resonance for a Single NV– Center in Diamond. J. Exp. Theor. Phys. 137, 772–780 (2023). https://doi.org/10.1134/S1063776123120221
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DOI: https://doi.org/10.1134/S1063776123120221