A Solid-State Microwave Magnetometer with Picotesla-Level Sensitivity
- URL: http://arxiv.org/abs/2206.15440v1
- Date: Thu, 30 Jun 2022 17:33:02 GMT
- Title: A Solid-State Microwave Magnetometer with Picotesla-Level Sensitivity
- Authors: Scott T. Alsid, Jennifer M. Schloss, Matthew H. Steinecker, John F.
Barry, Andrew C. Maccabe, Guoqing Wang, Paola Cappellaro, Danielle A. Braje
- Abstract summary: Quantum sensing of low-frequency magnetic fields using nitrogen-vacancy (NV) center ensembles has been demonstrated in multiple experiments with sensitivities as low as $sim$1 pT/$sqrttextHz$.
Here we adapt for microwave frequencies techniques that have enabled high-performance, low-frequency quantum sensors.
We demonstrate a Rabi-sequence-based magnetometer able to detect microwave fields near 2.87 GHz with a record sensitivity of 3.4 pT/$sqrttextrmHz$.
- Score: 6.651249440652801
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum sensing of low-frequency magnetic fields using nitrogen-vacancy (NV)
center ensembles has been demonstrated in multiple experiments with
sensitivities as low as $\sim$1 pT/$\sqrt{\text{Hz}}$. To date, however,
demonstrations of high-frequency magnetometry in the GHz regime with NV diamond
are orders of magnitude less sensitive, above the nT/$\sqrt{\text{Hz}}$ level.
Here we adapt for microwave frequencies techniques that have enabled
high-performance, low-frequency quantum sensors. Using a custom-grown
NV-enriched diamond combined with a noise cancellation scheme designed for
high-frequency sensing, we demonstrate a Rabi-sequence-based magnetometer able
to detect microwave fields near 2.87 GHz with a record sensitivity of 3.4
pT/$\sqrt{\textrm{Hz}}$. We demonstrate both amplitude and phase sensing and
project tunability over a 300 MHz frequency range. This result increases the
viability of NV ensembles to serve as microwave circuitry imagers and
near-field probes of antennas.
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