Simulation study of broadband microwave transmission through NV centers with orthogonal polarizations and DNN readout enables vector magnetometry at 5-100 pT/√Hz sensitivity down to 25 μT fields.
Polarization-assisted Vector Magnetometry in Zero Bias Field with an Ensemble of Nitrogen-Vacancy Centers in Diamond
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abstract
We demonstrate vector magnetometry with an ensemble of nitrogen-vacancy (NV) centers in diamond without the need for an external bias field. The anisotropy of the electric dipole moments of the NV center reduces the ambiguity of the optically detected magnetic resonances upon polarized visible excitation. Further lifting of the remaining ambiguities is achieved via application of an appropriately linearly polarized microwave field, which enables suppression of spin-state transitions of a certain crystallographic NV orientation. This allows for the full vector reconstruction of small (less 0.1 mT) magnetic fields without an external bias field having to interfere with the magnetic structure.
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Vector Magnetometry with Broadband Microwave Fields in Nitrogen-Vacancy Centers in Diamond
Simulation study of broadband microwave transmission through NV centers with orthogonal polarizations and DNN readout enables vector magnetometry at 5-100 pT/√Hz sensitivity down to 25 μT fields.