Fast Scanning Nitrogen-Vacancy Magnetometry by Spectrum Demodulation

Welter P, Josteinsson BA, Josephy S, Wittmann A, Morales A, Puebla-Hellmann G, Degen CL (2023)

Publication Type: Journal article

Publication year: 2023

Journal

Physical Review Applied American Physical Society

Book Volume: 19

Article Number: 034003

Journal Issue: 3

DOI: 10.1103/PhysRevApplied.19.034003

Abstract

We demonstrate a spectrum demodulation technique allowing for rapid imaging in scanning nitrogen-vacancy center magnetometry. Our method relies on a periodic excitation of the electron spin resonance by wide-band frequency sweeps at a kilohertz rate combined with a phase-locked detection of the photoluminescence signal. The technique is robust against changes in spectrum shape and photoluminescence intensity, and is readily extended by a frequency feedback to enable real-time tracking of the spin resonance. Fast scanning magnetometry is especially useful for samples where the signal dynamic range is large, of order millitesla, such as for ferromagnets or ferrimagnets. We demonstrate our method by mapping stray fields above the model antiferromagnet α-Fe2O3 (hematite) at pixel rates of up to 100Hz and an image resolution exceeding one megapixel.

Involved external institutions

Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich CH Switzerland (CH) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE) QZabre Ltd CH Switzerland (CH)

How to cite

APA:

Welter, P., Josteinsson, B.A., Josephy, S., Wittmann, A., Morales, A., Puebla-Hellmann, G., & Degen, C.L. (2023). Fast Scanning Nitrogen-Vacancy Magnetometry by Spectrum Demodulation. Physical Review Applied, 19(3). https://dx.doi.org/10.1103/PhysRevApplied.19.034003

MLA:

Welter, P., et al. "Fast Scanning Nitrogen-Vacancy Magnetometry by Spectrum Demodulation." Physical Review Applied 19.3 (2023).

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