Vector magnetometry based on polarimetric optically detected magnetic resonance

Philipp Reuschel; Mario Agio; Assegid M. Flatae

doi:10.1117/12.2685126

4 October 2023 Vector magnetometry based on polarimetric optically detected magnetic resonance

Philipp Reuschel, Mario Agio, Assegid M. Flatae

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Proceedings Volume PC12746, SPIE-CLP Conference on Advanced Photonics 2023; PC1274603 (2023) https://doi.org/10.1117/12.2685126
Event: SPIE-CLP Conference on Advanced Photonics, 2023, San Diego, California, United States

Abstract

The negatively charged nitrogen-vacancy color center in diamond has been identified as a sensitive magnetic field sensor based on the optically detected magnetic resonance (ODMR). However, it requires knowledge of the crystal axes and it needs an external magnetic bias field to measure the field’s orientation, or the use of single centers. Recently, by combining ensembles of color centers with polarimetry, we have been able to determine the magnitude and direction of an unknown magnetic field. The out-of-plane polarization components of the excitation laser create asymmetry in the polarization resolved ODMR spectrum. This provides the necessary conditions to reconstruct the three-dimensional magnetic field vector without a bias field. Our approach is general for other spin-1 color centers with the same symmetry, and it is compatible with standard microscopy methods, such as scanning probe, super-resolution, confocal, and wide-field imaging.

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Philipp Reuschel, Mario Agio, and Assegid M. Flatae "Vector magnetometry based on polarimetric optically detected magnetic resonance", Proc. SPIE PC12746, SPIE-CLP Conference on Advanced Photonics 2023, PC1274603 (4 October 2023); https://doi.org/10.1117/12.2685126

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KEYWORDS

Magnetism

Quantum magnetometry

Color centers

Polarimetry

Quantum detection

Crystals

Diamond

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