Comparing continuous and pulsed nitrogen-vacancy DC magnetometry in the optical-power-limited regime
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2023-11-10 |
| Journal | Journal of the Optical Society of America B |
| Authors | Maggie Haitian Wang, Michael Caouette-Mansour, Adrian Solyom, Lilian Childress |
| Institutions | McGill University |
| Citations | 2 |
Abstract
Section titled âAbstractâEnsembles of nitrogen-vacancy (NV) center spins in diamond offer a robust, precise, and accurate magnetic sensor. As their applications move beyond the laboratory, practical considerations including size, complexity, and power consumption become important. Here, we compare two commonly employed NV magnetometry techniquesâcontinuous-wave (CW) versus pulsed magnetic resonanceâin a scenario limited by the total available optical power. We develop a consistent theoretical model for the magnetic sensitivity of each protocol that incorporates NV photophysicsâin particular, including the incomplete spin polarization associated with limited optical power; after comparing the modelsâ behavior to experiments, we use them to predict the relative DC sensitivity of CW versus pulsed operation for an optical-power-limited, shot-noise-limited NV ensemble magnetometer. We find a âź2â3Ă gain in sensitivity for pulsed operation, which is significantly smaller than seen in power-unlimited, single-NV experiments [ Phys. Rev. B 84 , 195204 ( 2011 ) PRBMDO 0163-1829 10.1103/PhysRevB.84.195204 ]. Our results provide a resource for practical sensor development, informing protocol choice and identifying optimal operation regimes when optical power is constrained.