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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