Overtone Rabi oscillation of optically polarized triplet electron spins and nuclear hyperpolarization in powder

• URL: http://arxiv.org/abs/2506.10498v1
• Date: Thu, 12 Jun 2025 09:01:17 GMT
• Title: Overtone Rabi oscillation of optically polarized triplet electron spins and nuclear hyperpolarization in powder
• Authors: Koichiro Miyanishi, Takuya F. Segawa, Makoto Negoro, Akinori Kagawa, Kazuyuki Takeda,
• Abstract summary: We report coherent overtone Rabi oscillations of optically-polarized triplet electron spins and nuclear hyperpolarization in powder samples at room temperature.<n>Overtone Rabi oscillations are observed in pentacene-doped textitpterphenyl and NV$-$ centers in microdiamonds.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We report coherent overtone Rabi oscillations of optically-polarized triplet electron spins and nuclear hyperpolarization in powder samples at room temperature. The strong orientation dependence through the zero-field splitting (ZFS) interaction in the single-quantum transition is overcome by coherently driving the significantly narrower overtone transition. Analytical formulas for the overtone lineshape and nutation functions for axially symmetric ZFS interactions are derived. Overtone Rabi oscillations are observed in pentacene-doped \textit{p}-terphenyl and NV$^-$ centers in microdiamonds. For the former, overtone triplet dynamic nuclear polarization using the integrated solid effect leads to a $^1$H nuclear spin polarization of $0.183\pm0.005$\% at a magnetic field of 0.2 T. The $^1$H NMR polarization is enhanced by 2600-fold with respect to thermal equilibrium and reaches a large portion of the randomly oriented microcrystals.

Related papers

• The role of nuclear spin diffusion in dynamic nuclear polarization of crystalline nanoscale silicon particles [0.112351450483835]
  Hyperpolarized nanoparticles (NPs) offer high polarization levels with room temperature relaxation times exceeding half an hour.<n>In this work, we demonstrate that the achievable hyperpolarization enhancement and relaxation (decay) time at room temperature are largely independent of the particle size.
  arXiv  Detail & Related papers  (2024-12-13T20:09:03Z)
• Two-electron two-nucleus effective Hamiltonian and the spin diffusion barrier [0.16385815610837165]
  Dynamic nuclear polarization (DNP) involves a polarization transfer from unpaired electrons to hyperfine coupled nuclei. Hyperfine coupling is considered to suppress nuclear dipolar flip-flop transitions, hindering the transport of nuclear hyperpolarization into the bulk. An energy-conserving electron-nuclear four-spin flip-flop is identified, which combines an electron dipolar with a nuclear dipolar flip-flop process.
  arXiv  Detail & Related papers  (2024-07-14T20:25:12Z)
• Waveguide quantum electrodynamics at the onset of spin-spin correlations [36.136619420474766]
  We find that molecules belonging to one of the two crystal sublattices form one-dimensional spin chains.<n>The microwave transmission shows evidences for the collective coupling of quasi-identical spins to the propagating photons.
  arXiv  Detail & Related papers  (2024-04-04T18:00:05Z)
• $^{13}$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)
• Anisotropic electron-nuclear interactions in a rotating quantum spin bath [55.41644538483948]
  Spin-bath interactions are strongly anisotropic, and rapid physical rotation has long been used in solid-state nuclear magnetic resonance. We show that the interaction between electron spins of nitrogen-vacancy centers and a bath of $13$C nuclear spins introduces decoherence into the system. Our findings offer new insights into the use of physical rotation for quantum control with implications for quantum systems having motional and rotational degrees of freedom that are not fixed.
  arXiv  Detail & Related papers  (2021-05-16T06:15:00Z)
• Chemical tuning of spin clock transitions in molecular monomers based on nuclear spin-free Ni(II) [52.259804540075514]
  We report the existence of a sizeable quantum tunnelling splitting between the two lowest electronic spin levels of mononuclear Ni complexes. The level anti-crossing, or magnetic clock transition, associated with this gap has been directly monitored by heat capacity experiments. The comparison of these results with those obtained for a Co derivative, for which tunnelling is forbidden by symmetry, shows that the clock transition leads to an effective suppression of intermolecular spin-spin interactions.
  arXiv  Detail & Related papers  (2021-03-04T13:31:40Z)
• Maximising Dynamic Nuclear Polarisation via Selective Hyperfine Tuning [0.0]
  We show that for systems of electronic spin $Sgeq1$ possessing an intrinsic zero-field splitting, a separate class of stronger hyperfine interactions may be utilised to improve DNP efficiency and yield. We analytically review existing methods, and determine that this approach increases the rate of polarisation transfer to the nuclear ensemble by up to an order of magnitude over existing techniques.
  arXiv  Detail & Related papers  (2020-12-23T06:19:15Z)
• Direct high resolution resonant Raman scattering measurements of InAs quantum dot dynamic nuclear spin polarization states [0.0]
  We report on the direct measurement of the electron spin splitting and the accompanying nuclear Overhauser (OH) field. The observed two-dimensional maps reveal an OH field that has a non-linear dependence on excitation frequency. The magnitude of the field, which is as large as 400 mT, is measured with sub-100 nuclear spin sensitivity.
  arXiv  Detail & Related papers  (2020-11-26T11:41:23Z)
• Demonstration of dipolar-induced enhancement of parametric effects in polariton waveguides [40.96261204117952]
  Exciton-polaritons are hybrid light-matter excitations arising from the non-fluidative coupling of a photonic mode and an excitonic resonance. We show that dipolar interactions can be used to enhance parametric effects such as self-phase modulation in waveguide polaritons.
  arXiv  Detail & Related papers  (2020-05-22T20:45:31Z)
• 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)
• Effect of phonons on the electron spin resonance absorption spectrum [62.997667081978825]
  We model the effect of phonons and temperature on the electron spin resonance (ESR) signal in magnetically active systems. We find that the suppression of ESR signals is due to phonon broadening but not based on the common assumption of orbital quenching.
  arXiv  Detail & Related papers  (2020-04-22T01:13:07Z)

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.