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arXiv · 1212.0035

Sensitive Magnetic Control of Ensemble Nuclear Spin Hyperpolarisation in Diamond

Hai-Jing Wang·Chang S. Shin·Claudia E. Avalos·Scott J. Seltzer·Dmitry Budker·Alexander Pines·Vikram S. Bajaj
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Abstract

Dynamic nuclear polarisation, which transfers the spin polarisation of electrons to nuclei, is routinely applied to enhance the sensitivity of nuclear magnetic resonance; it is also critical in spintronics, particularly when spin hyperpolarisation can be produced and controlled optically or electrically. Here we show the complete polarisation of nuclei located near the optically-polarised nitrogen-vacancy (NV) centre in diamond. When approaching the ground-state level anti-crossing condition of the NV electron spins, 13C nuclei in the first-shell are polarised in a pattern that depends sensitively and sharply upon the magnetic field. Based on the anisotropy of the hyperfine coupling and of the optical polarisation mechanism, we predict and observe a complete reversal of the nuclear spin polarisation with a few-mT change in the magnetic field. The demonstrated sensitive magnetic control of nuclear polarisation at room temperature will be useful for sensitivity-enhanced NMR, nuclear-based spintronics, and quantum computation in diamond.

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Hai-Jing Wang, Chang S. Shin, Claudia E. Avalos, Scott J. Seltzer, Dmitry Budker, Alexander Pines, Vikram S. Bajaj. 2012-11-30. Sensitive Magnetic Control of Ensemble Nuclear Spin Hyperpolarisation in Diamond. https://arxiv.org/abs/1212.0035

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