High-resolution wide-field magnetic imaging with sparse sampling using nitrogen-vacancy centers

• URL: http://arxiv.org/abs/2602.00679v1
• Date: Sat, 31 Jan 2026 11:54:19 GMT
• Title: High-resolution wide-field magnetic imaging with sparse sampling using nitrogen-vacancy centers
• Authors: Keqing Liu, Jiazhao Tian, Bokun Duan, Hao Zhang, Kangze Li, Guofeng Zhang, Fedor Jelezko, Ressa S. Said, Jianming Cai, Liantuan Xiao,
• Abstract summary: Nitrogen-vacancy (NV) centers in diamond enable quantitative magnetic imaging.<n>We present a sparse-sampling strategy for reconstructing high-resolution wide-field images from only a small number of measurements.
• Score: 5.067544639411884
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Nitrogen-vacancy (NV) centers in diamond enable quantitative magnetic imaging, yet practical implementations must balance spatial resolution against acquisition time (and thus per-pixel sensitivity). Single-NV scanning magnetometry achieves genuine nanoscale resolution, nonetheless requires typically a slow pixel-by-pixel acquisition. Meanwhile, wide-field NV-ensemble microscopy provides parallel readout over a large field of view, however is jointly limited by the optical diffraction limit and the sensor-sample standoff. Here, we present a sparse-sampling strategy for reconstructing high-resolution wide-field images from only a small number of measurements. Using simulated NV-ensemble detection of ac magnetic fields, we show that a mean-adjusted Bayesian estimation (MABE) framework can reconstruct 10000-pixel images from only 25 sampling points, achieving SSIM values exceeding 0.999 for representative smooth field distributions, while optimized dynamical-decoupling pulse sequences yield an approximately twofold improvement in magnetic-field sensitivity. The method further clarifies how sampling patterns and sampling density affect reconstruction accuracy and suggests a route toward faster and more scalable magnetic-imaging architectures that may extend to point-scanning NV sensors and other magnetometry platforms, such as SQUIDs, Hall probes, and magnetic tunnel junctions.

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