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arXiv · 2410.21182

Microscale Sensing with Strongly Interacting NV Ensembles at High Fields

Ainitze Biteri-Uribarren·Ana Martin·Jorge Casanova
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Abstract

Advances in sensing devices that utilize nitrogen-vacancy (NV) center ensembles in diamond are driving progress in microscale nuclear magnetic resonance spectroscopy. Utilizing quantum sensing techniques in the high-field regime significantly boosts sensitivity by increasing thermal polarization and improves spectral quality via enhanced energy shifts. Compatible with the latter, a straightforward manner to further raise sensor sensitivity is to increase NV concentration, although this intensifies detrimental dipole-dipole interactions among NVs. In this Letter, we present a method for detecting NMR signals in high-field scenarios while effectively suppressing dipole-dipole couplings in the NV ensemble. Thus, this approach enhances sensitivity by combining highly doped diamond substrates and elevated magnetic fields.

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Ainitze Biteri-Uribarren, Ana Martin, Jorge Casanova. 2024-10-28. Microscale Sensing with Strongly Interacting NV Ensembles at High Fields. https://doi.org/10.1103/jksj-736v

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