High field magnetometry with hyperpolarized nuclear spins

Ozgur Sahin, Erica Leon Sanchez, Sophie Conti, Amala Akkiraju, Paul Reshetikhin, Emanuel Druga, Aakriti Aggarwal, Benjamin Gilbert, Sunil Bhave and Ashok Ajoy ()
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Ozgur Sahin: University of California, Berkeley
Erica Leon Sanchez: University of California, Berkeley
Sophie Conti: University of California, Berkeley
Amala Akkiraju: University of California, Berkeley
Paul Reshetikhin: University of California, Berkeley
Emanuel Druga: University of California, Berkeley
Aakriti Aggarwal: University of California, Berkeley
Benjamin Gilbert: Lawrence Berkeley National Laboratory
Sunil Bhave: Purdue University
Ashok Ajoy: University of California, Berkeley

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract Quantum sensors have attracted broad interest in the quest towards sub-micronscale NMR spectroscopy. Such sensors predominantly operate at low magnetic fields. Instead, however, for high resolution spectroscopy, the high-field regime is naturally advantageous because it allows high absolute chemical shift discrimination. Here we demonstrate a high-field spin magnetometer constructed from an ensemble of hyperpolarized 13C nuclear spins in diamond. They are initialized by Nitrogen Vacancy (NV) centers and protected along a transverse Bloch sphere axis for minute-long periods. When exposed to a time-varying (AC) magnetic field, they undergo secondary precessions that carry an imprint of its frequency and amplitude. For quantum sensing at 7T, we demonstrate detection bandwidth up to 7 kHz, a spectral resolution

Date: 2022
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DOI: 10.1038/s41467-022-32907-8

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