Microscale Sensing with Strongly Interacting NV Ensembles at High Fields

• URL: http://arxiv.org/abs/2410.21182v1
• Date: Mon, 28 Oct 2024 16:22:45 GMT
• Title: Microscale Sensing with Strongly Interacting NV Ensembles at High Fields
• Authors: Ainitze Biteri-Uribarren, Ana Martin, Jorge Casanova,
• Abstract summary: We present a method for detecting NMR signals in high-field scenarios while effectively suppressing dipole-dipole couplings in the NV ensemble. This approach enhances sensitivity by combining highly doped diamond substrates and elevated magnetic fields.
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• Abstract: Advances in sensing devices that utilize 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 improve 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 work, 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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