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Near-zero-field microwave-free magnetometry with nitrogen-vacancy centers in nanodiamonds

Authors :
Dhungel, Omkar
Mrózek, Mariusz
Lenz, Till
Ivády, Viktor
Gali, Adam
Wickenbrock, Arne
Budker, Dmitry
Gawlik, Wojciech
Wojciechowski, Adam M.
Source :
Opt. Express, 32(12), 21936-21945 (2024)
Publication Year :
2024

Abstract

We study the fluorescence of nanodiamond ensembles as a function of static external magnetic field and observe characteristic dip features close to the zero field with potential for magnetometry applications. We analyze the dependence of the features width and contrast of the feature on the size of the diamond (in the range 30 nm to 3 um) and on the strength of a bias magnetic field applied transversely to the field being scanned. We also perform optically detected magnetic resonance (ODMR) measurements to quantify the strain splitting of the zero-field ODMR resonance across various nanodiamond sizes and compare it with the width and contrast measurements of the zero-field fluorescence features for both nanodiamonds and bulk samples. The observed properties provide compelling evidence of cross-relaxation effects in the NV system occurring close to zero magnetic fields. Finally, the potential of this technique for use in practical magnetometry is discussed.<br />Comment: 9 pages, 5 figures

Details

Database :
arXiv
Journal :
Opt. Express, 32(12), 21936-21945 (2024)
Publication Type :
Report
Accession number :
edsarx.2401.08246
Document Type :
Working Paper
Full Text :
https://doi.org/10.1364/OE.521124