DOE OSTI Β· 3019690
All-optical photoluminescence response of nitrogen-vacancy ensembles in diamond at low magnetic fields
Abstract
All-optical (AO) microwave-free magnetometry using nitrogen-vacancy (N-π) centers in diamond is attractive due to its broad applicability and reduced experimental complexity. In this work, we investigate room-temperature AO photoluminescence (PL) at low magnetic fields ( <2 mT) using diamonds with N-π ensembles at parts-per-million (ppm) concentrations. The measured AO-PL contrast features as a function of the applied magnetic field magnitude and direction are correlated with near-degenerate N-π electronic spin and hyperfine transitions from different N-π orientations within the diamond host. Reasonable agreement is found between low-field AO-PL measurements and model-based simulations of the effects of resonant dipolar interactions between N-π centers. The maximum observed AO-PL contrast depends on both the N-π concentration and the laser-illumination intensity at 532 nm. These results imply different optimal conditions for low-field AO N-π sensing compared to conventional optically detected magnetic resonance (ODMR) techniques, suggesting new research and application opportunities using AO measurements with lower system complexity, size, weight, and power.
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Zheng, Xiechen [University of Maryland, College Park, MD (United States)] (ORCID:0009000329952179), TΓ‘mara-Isaza, Jeyson [University of Maryland, College Park, MD (United States); Universidad Nacional de Colombia (Colombia)] (ORCID:0000000318487809), Yin, Zechuan [University of Maryland, College Park, MD (United States)] (ORCID:0009000806206153), Cremer, Johannes [University of Maryland, College Park, MD (United States)] (ORCID:0000000342474661), Blanchard, John W. [University of Maryland, College Park, MD (United States)] (ORCID:0000000216216637), Hart, Connor A. [University of Maryland, College Park, MD (United States)] (ORCID:0000000177517663), Crescimanno, Michael [University of Maryland, College Park, MD (United States); Youngstown State University, OH (United States)] (ORCID:0000000260512046), Petruzzi, Paul V. [Laboratory for Physical Sciences, College Park, MD (United States)] (ORCID:0009000150945446), Turner, Matthew J. [University of Maryland, College Park, MD (United States)], Walsworth, Ronald L. [University of Maryland, College Park, MD (United States)] (ORCID:0000000303114751). 2025-12-18. All-optical photoluminescence response of nitrogen-vacancy ensembles in diamond at low magnetic fields. https://doi.org/10.1103/ls1d-r771
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