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6CCVD Research

Robust nuclear hyperpolarization driven by strongly coupled nitrogen vacancy centers

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2021-09-08
JournalJournal of Applied Physics
AuthorsRalf Wunderlich, Robert Staacke, Wolfgang Knolle, Bernd Abel, JĆ¼rgen Haase
InstitutionsLeibniz Institute of Surface Engineering, Leipzig University
Citations6

Abstract

Section titled ā€œAbstractā€

Nuclear magnetic resonance techniques are widely used in the natural sciences but they lack sensitivity. Therefore, large sample volumes or long measurement times are necessary. In this work, we investigate the polarization of bulk 13C nuclei in a diamond above the thermal equilibrium at room temperature. Previously studied mechanisms utilize direct coupling to nitrogen vacancy centers or the additional assistance of substitutional nitrogen impurities for this purpose. We exploit strongly coupled nitrogen vacancy centers as polarization sources. We study two approaches to transfer the optically induced polarization of the electron spins of the nitrogen vacancy centers to nearby nuclear spins. First, the electron-nuclear polarization transfer is achieved by energy matching conditions or, second, by magnetic field sweeps inducing Landau-Zener-like transitions. Simulations according to a quantum mechanical system consisting of two coupled nitrogen vacancy centers and a weakly coupled 13C spin show an excellent agreement with the experimental data. Both approaches allow a reduction of the measurement time by roughly three orders of magnitude.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2015 - Brute-force hyperpolarization for NMR and MRI [Crossref]
  2. 2015 - Hyperpolarized nanodiamond with long spin-relaxation times [Crossref]
  3. 2013 - The nitrogen-vacancy colour centre in diamond [Crossref]
  4. 2016 - The phenomenology of optically pumped 13C NMR in diamond at 7.05ā€‰T: Room temperature polarization, orientation dependence, and the effect of defect concentration on polarization dynamics [Crossref]
  5. 2013 - Bulk nuclear polarization enhanced at room temperature by optical pumping [Crossref]
  6. 2017 - Optically induced cross relaxation via nitrogen-related defects for bulk diamond 13C hyperpolarization [Crossref]
  7. 2013 - Sensitive magnetic control of ensemble nuclear spin hyperpolarization in diamond [Crossref]
  8. 2015 - Local and bulk 13C hyperpolarization in nitrogen-vacancy-centred diamonds at variable fields and orientations [Crossref]
  9. 2011 - A quantum memory intrinsic to single nitrogen vacancy centres in diamond [Crossref]
  10. 2016 - Optically induced dynamic nuclear spin polarisation in diamond [Crossref]

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