2023/10/29 by Ekrem Taha Güldeste, Güldeste, Ekrem Taha, Ceyhun Bulutay +1 · 1 citation
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Atomic and Subatomic Physics Research #Diamond and Carbon-based Materials Research #FOS: Physical sciences #High-pressure geophysics and materials #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.2310.18959
openalex publication_date 2023/10/29 · openalex created_date 2023/11/01 · openalex updated_date 2026/07/28
Nitrogen-vacancy (NV) centers in diamond constitute a solid-state nanosensing paradigm. Specifically for high-precision magnetometry, the so-called Ramsey interferometry is the prevalent choice where the sensing signal is extracted from time-resolved spin-state-dependent photoluminescence (PL) data. Its sensitivity is ultimately limited by the photon shot noise, which cannot be sufficiently removed by averaging or frequency filtering. Here, we propose Ramsey DC magnetometry of a single NV center enhanced by a wavelet-denoising scheme specifically tailored to suppress photon shot noise. It simply operates as a classical post-processing applied on a collected PL time series. Our implementation is based on a method that we named template margin thresholding which enables not only frequency but also time-dependent denoising. We computationally benchmark its DC magnetic field sensing signal-to-noise-ratio improvement over the raw PL data around an order of magnitude.