Rapidly enhanced spin polarization injection in an optically pumped spin ratchet

Abstract

Rapid injection of spin polarization into an ensemble of nuclear spins is a problem of broad interest, spanning dynamic nuclear polarization (DNP) to quantum information science. We report on a strategy to boost the spin injection rate by exploiting electrons that can be rapidly polarized via high-power optical pumping. We demonstrate this in a model system of Nitrogen Vacancy center electrons injecting polarization into a bath of 13C nuclei in diamond. We deliver >20W of continuous, nearly isotropic, optical power to the sample, constituting a substantially higher power than in previous experiments. Through a spin-ratchet polarization transfer mechanism, we show boosts in spin injection rates by over two orders of magnitude. Our experiments elucidate bottlenecks in the DNP process caused by rates of electron polarization, polarization transfer to proximal nuclei, and spin diffusion. This work demonstrates opportunities for rapid spin injection employing non-thermally generated electron polarization, and has relevance to a broad class of experimental systems including in DNP, quantum sensing, and spin-based MASERs.

arXiv comment8 pages, 8 figures. SI: 3 pages, 4 figures

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Cited by in corpus (7)

• High-Field Magnetometry with Hyperpolarized Nuclear Spins
• ${}^{13}$C Hyperpolarization with Nitrogen-Vacancy Centers in Micro- and Nanodiamonds for Sensitive Magnetic Resonance Applications
• Electron induced nanoscale nuclear spin relaxation probed by hyperpolarization injection
• Experimental observation of a time rondeau crystal: Temporal Disorder in Spatiotemporal Order
• Sensing with discrete time crystals
• Electron-to-nuclear spectral mapping via "Galton board" dynamic nuclear polarization
• Continuously tracked, stable, large excursion trajectories of dipolar coupled nuclear spins