Microscale Sensing with Strongly Interacting NV Ensembles at High Fields

2024/10/28 by Ainitze Biteri-Uribarren, Biteri-Uribarren, Ainitze, Ana Isabel Martı́n +3 · 2 citations
Engineering · Materials Science · #Advanced MEMS and NEMS Technologies #Characterization and Applications of Magnetic Nanoparticles #Diamond and Carbon-based Materials Research #FOS: Physical sciences #Quantum Physics (quant-ph)

paper · pdf · doi:10.48550/arxiv.2410.21182

openalex publication_date 2024/10/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

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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