Efficient Signal Processing for Low-Cost Magnetometry Using Nitrogen Vacancy Center in Diamond

At a Glance

Metadata	Details
Publication Date	2023-01-01
Journal	IEEE Transactions on Instrumentation and Measurement
Authors	Sonia Sarkar, Alok Gokhale, Madhur Parashar, Kasturi Saha
Institutions	Indian Institute of Technology Kharagpur, Indian Institute of Technology Bombay
Citations	10

Abstract

Nitrogen vacancy (NV) center-based magnetometers have progressed from proof-of-concept demonstrations to tabletop and compact devices as a consequence of the global focus on developing commercially viable solutions. Although the magnetometer’s sensor head has been shrunk, the platform’s electronics/test equipment form factor and requirements continue to be a significant barrier to the creation of low-cost solutions. As a result, the usability and accessibility of an NV-based magnetometer are constrained. In order to reduce sensor size, overall power consumption, and accessibility, we have developed a method based on the fast Fourier transform (FFT) to detect optically detected magnetic resonance in an ensemble of NV centers without the usage of cumbersome and expensive bench-top equipment, such as a lock-in amplifier. We perform a detailed comparative study of this protocol with the existing methods used for magnetic field sensing. We use this methodology to report a sensitivity of 126 nT/ <inline-formula xmlns:mml=“http://www.w3.org/1998/Math/MathML” xmlns:xlink=“http://www.w3.org/1999/xlink”> <tex-math notation=“LaTeX”>$\sqrt {\text {Hz}}$ </tex-math></inline-formula> with the goal of developing protocols for low-cost magnetometry, making the magnetometer accessible with minimal components and laboratory setup, and serving as an easy way to teach enthusiasts even at the undergraduate level.

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Original Source

DOI: https://doi.org/10.1109/tim.2023.3234086

References

2019 - A CMOS-integrated quantum sensor based on nitrogen-vacancy centres [Crossref]