Microwave-Free $^{13}$C Hyperpolarization of Diamond Particles Enabled by Magic Angle Spinning and NV Centers

• URL: http://arxiv.org/abs/2609.07653v1
• Date: Mon, 07 Sep 2026 15:41:10 GMT
• Title: Microwave-Free $^{13}$C Hyperpolarization of Diamond Particles Enabled by Magic Angle Spinning and NV Centers
• Abstract summary: Nuclear hyperpolarization from optically pumped color centers in solids offers an alternative to conventional microwave-driven dynamic nuclear polarization (DNP)<n>Diamond can host the nitrogen vacancy (NV) center, whose ground spin state can be readily polarized by light at room temperature.<n>We report $13rm C$ nuclear hyperpolarization in randomly oriented diamond particles with sizes ranging from 0.2 to 2 $$m.
• Score: 1.2292040390978565
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: Nuclear hyperpolarization from optically pumped color centers in solids offers an alternative to conventional microwave-driven dynamic nuclear polarization (DNP). Diamond can host the nitrogen vacancy (NV) center, whose ground spin state can be readily polarized by light at room temperature, making diamond a candidate platform for nuclear hyperpolarization. We report $^{13}{\rm C}$ nuclear hyperpolarization in randomly oriented diamond particles with sizes ranging from 0.2 to 2 $μ$m, both at natural $^{13}{\rm C}$ abundance (1.1 %) and at 20 % isotopic enrichment, at magnetic fields of 7.1 T and 9.4 T. The protocol combines optical illumination with magic angle spinning (MAS) and does not require microwave irradiation. By investigating the nuclear polarization as a function of the MAS frequency between 0 and 6 kHz at the magnetic field of 7.1 T, we find maximum light-induced polarization enhancements of $280$-fold for the isotopically enriched sample and $411$-fold for the natural abundance sample. Under continuous illumination, steady-state absolute $^{13}{\rm C}$ polarization levels above 0.1 % are reached. A model involving optical pumping of NV centers and spin dynamics near level anticrossings (LACs) in three-spin clusters formed by NV, a substitutional nitrogen (P1) and $^{13}{\rm C}$ is used to describe these findings. The protocol strongly mitigates the effect of the anisotropy of the NV spin Hamiltonian, allowing more than $99.9\%$ of NV orientations to participate in the polarization transfer process. These results represent a first step toward transferring nuclear polarization from diamond particles to external nuclei, with potential applications in sensitive and high-resolution NMR at room temperature.

Related papers

• Optically detected nuclear magnetic resonance of carbon-13 in bulk diamond [0.03884646686228737]
  We investigate 13C nuclear spins in diamond as a candidate system for solid-state implementations.<n>We demonstrate a technique that allows for both optical polarization and readout of large ensembles of polarized nuclear spins.<n>Our method can be interpreted as a type of repetitive readout, where each NV center optically reads out the spin state of 100 nuclei before nuclear spins depolarize.
  arXiv  Detail & Related papers  (2026-04-30T19:19:37Z)
• Cavity-enhanced spectroscopy of individual nuclear spins in a dense bath [39.58317527488534]
  Echo-based spectroscopy of the superhyperfine interaction of an electronic spin with nuclear spins in its surroundings enables detailed insights into the microscopic magnetic environment of spins in solids.<n>It is an outstanding challenge to resolve individual nuclear spins in a dense bath, in which many of them exhibit a comparable coupling strength.<n>Here, we integrate the emitters into a high-finesse resonator, which allows for strong optical echoes even at very low concentrations.
  arXiv  Detail & Related papers  (2025-04-17T14:03:10Z)
• Highly nondegenerate polarization-entangled photon pairs produced through noncritical phasematching in single-domain KTiOPO$_4$ [44.99833362998488]
  A source of polarization-entangled photon pairs with low temperature sensitivity based on noncritical phasematched (NCPM) SPDC was demonstrated.<n>With the signal photons detected locally, the idler photons were transmitted through 62km and 93km of deployed telecom fibers.
  arXiv  Detail & Related papers  (2025-02-26T02:09:13Z)
• First Sub-MeV Dark Matter Search with the QROCODILE Experiment Using Superconducting Nanowire Single-Photon Detectors [51.550188330599525]
  We present the first results from the Quantum Resolution-d Cryogenic Observatory for Dark matter Incident at Low Energy (QROCODILE)<n>The QROCODILE experiment uses a microwire-based superconducting nanowire single-photon detector (SNSPD) as a target and sensor for dark matter scattering and absorption.<n>We report new world-leading constraints on the interactions of sub-MeV dark matter particles with masses as low as 30 keV.
  arXiv  Detail & Related papers  (2024-12-20T19:00:00Z)
• Achieving 5 % $^{13}$C nuclear spin hyperpolarization in high-purity diamond at room temperature and low field [0.0]
  We show that at below 10 mT, a $13$C polarization of 5 % can be obtained, equivalent to an enhancement ratio over $7 times 106$. By aligning the magnetic field along [100], the number of NV spins participating in polarization transfer increases fourfold.
  arXiv  Detail & Related papers  (2024-09-29T00:02:54Z)
• Robust external spin hyperpolarization of quadrupolar nuclei enabled by strain [7.997969189140034]
  We show the possibility of obtaining external spin-polarization by magnetic-field sweeps across the level anticrossings around zero-field. Results pave the way for hyperpolarization of spins in nanomaterials near the diamond surface without experiencing polarization loss to intrinsic nuclear spin-1/2 species. The 11B spins in h-BN nanosheets, with their extended relaxation time and large surface area, present a promising alternative for relayed nuclear polarization to the liquid phase.
  arXiv  Detail & Related papers  (2024-04-28T06:41:47Z)
• $^{13}$C Hyperpolarization with Nitrogen-Vacancy Centers in Micro- and Nanodiamonds for Sensitive Magnetic Resonance Applications [0.5312470855079862]
  Nuclear hyperpolarization is a known method to enhance the signal in nuclear magnetic resonance (NMR) by orders of magnitude. The present work addresses the $13$C hyperpolarization in diamond micro- and nanoparticles, using the optically-pumped nitrogen-vacancy center (NV) to polarize $13$C spins at room temperature.
  arXiv  Detail & Related papers  (2024-03-21T16:18:20Z)
• Rapidly enhanced spin polarization injection in an optically pumped spin ratchet [49.1301457567913]
  We report on a strategy to boost the spin injection rate by exploiting electrons that can be rapidly polarized. We demonstrate this in a model system of Nitrogen Vacancy center electrons injecting polarization into a bath of 13C nuclei in diamond. Through a spin-ratchet polarization transfer mechanism, we show boosts in spin injection rates by over two orders of magnitude.
  arXiv  Detail & Related papers  (2021-12-14T08:23:10Z)
• Optical dynamic nuclear polarization of $^{13}$C spins in diamond at a low field with multi-tone microwave irradiation [1.0499611180329804]
  Triplet structures corresponding to $14$N hyperfine splitting were clearly observed in the spectrum of $13$C polarization. By simultaneously irradiating three microwave frequencies matching to the peaks of the triplet, we achieved a $13$C bulk polarization of 0.113 %.
  arXiv  Detail & Related papers  (2021-10-28T02:14:34Z)
• Solid-state laser refrigeration of nanodiamond quantum sensors [43.55994393060723]
  Solid-state laser refrigeration can be used to enable rapid optical temperature control of nitrogen vacancy doped nanodiamond quantum sensors. Heat transfer to the ceramic microcrystals cooled the adjacent NV$-$:NDs by 10 and 27 K at atmospheric pressure and $sim$10$-3$ Torr.
  arXiv  Detail & Related papers  (2020-07-30T05:57:01Z)
• Optically pumped spin polarization as a probe of many-body thermalization [50.591267188664666]
  We study the spin diffusion dynamics of 13C in diamond, which we dynamically polarize at room temperature via optical spin pumping of engineered color centers. We find good thermal contact throughout the nuclear spin bath, virtually independent of the hyperfine coupling strength. Our results open intriguing opportunities to study the onset of thermalization in a system by controlling the internal interactions within the bath.
  arXiv  Detail & Related papers  (2020-05-01T23:16:33Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.