Related papers: Fast scanning nitrogen-vacancy magnetometry by spectrum demodulation

Fast scanning nitrogen-vacancy magnetometry by spectrum demodulation

URL: http://arxiv.org/abs/2205.06579v1
Date: Fri, 13 May 2022 12:07:06 GMT
Title: Fast scanning nitrogen-vacancy magnetometry by spectrum demodulation
Authors: P. Welter, B. A. Josteinsson, S. Josephy, A. Wittmann, A. Morales, G. Puebla-Hellmann, and C. L. Degen
Abstract summary: We demonstrate a spectrum demodulation technique for speeding up the data acquisition rate in scanning nitrogen-vacancy center magnetometry. Our method relies on a periodic excitation of the electron spin resonance by fast, wide-band frequency sweeps combined with a phase-locked detection of the photo-luminescence signal.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We demonstrate a spectrum demodulation technique for greatly speeding up the data acquisition rate in scanning nitrogen-vacancy center magnetometry. Our method relies on a periodic excitation of the electron spin resonance by fast, wide-band frequency sweeps combined with a phase-locked detection of the photo-luminescence signal. The method can be extended by a frequency feedback to realize 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, like for ferro- or ferrimagnets. We demonstrate our method by mapping stray fields above the model antiferromagnet $\alpha$-Fe$_2$O$_3$ (hematite) at pixel rates of up to 100\,Hz and an image resolution exceeding one megapixel.

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