Comparing continuous and pulsed nitrogen-vacancy DC magnetometry in the
optical-power-limited regime
- URL: http://arxiv.org/abs/2311.06055v1
- Date: Fri, 10 Nov 2023 13:39:15 GMT
- Title: Comparing continuous and pulsed nitrogen-vacancy DC magnetometry in the
optical-power-limited regime
- Authors: Maggie Wang, Michael Caouette-Mansour, Adrian Solyom and Lilian
Childress
- Abstract summary: We compare two commonly-employed NV magnetometry techniques -- continuous-wave (CW) vs pulsed magnetic resonance.
We find a $sim 2-3 times$ gain in sensitivity for pulsed operation, which is significantly smaller than seen in power-unlimited, single-NV experiments.
- Score: 1.3654846342364308
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: Ensembles 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 techniques -- continuous-wave (CW) vs pulsed magnetic resonance --
in a scenario limited by total available optical power. We develop a consistent
theoretical model for the magnetic sensitivity of each protocol that
incorporates NV photophysics - in particular, including the incomplete spin
polarization associated with limited optical power; after comparing the models'
behaviour 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 $\sim 2-3 \times$ gain in sensitivity for
pulsed operation, which is significantly smaller than seen in power-unlimited,
single-NV experiments. Our results provide a resource for practical sensor
development, informing protocol choice and identifying optimal operation
regimes when optical power is constrained.
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