High field magnetometry with hyperpolarized nuclear spins
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 $$/\sqrt{{{{{{{{\rm{Hz}}}}}}}}}$$ / Hz . This work anticipates opportunities for microscale NMR chemical sensors constructed from hyperpolarized nanodiamonds and suggests applications of dynamic nuclear polarization (DNP) in quantum sensing.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 19, 2022
- Source ID
- 10.1038/s41467-022-32907-8
Entities
People
- Aakriti Aggarwal
- Amala Akkiraju
- Ashok Ajoy
- Benjamin Gilbert
- Emanuel Druga
- Erica De Leon Sanchez
- Ozgur Sahin
- Paul Reshetikhin
- Sophie Conti
- Sunil Ashok Bhave
Organizations
- Office of Basic Energy Sciences
- Office of Naval Research