تقرير
Hyperpolarisation of external nuclear spins using nitrogen-vacancy centre ensembles
| العنوان: | Hyperpolarisation of external nuclear spins using nitrogen-vacancy centre ensembles |
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| المؤلفون: | Healey, A. J., Hall, L. T., White, G. A. L., Teraji, T., Sani, M. -A., Separovic, F., Tetienne, J. -P., Hollenberg, L. C. L. |
| المصدر: | Physical Review Applied 15, 054052 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter Quantum Physics |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Quantum Physics |
| الوصف: | The nitrogen-vacancy (NV) centre in diamond has emerged as a candidate to non-invasively hyperpolarise nuclear spins in molecular systems to improve the sensitivity of nuclear magnetic resonance (NMR) experiments. Several promising proof of principle experiments have demonstrated small-scale polarisation transfer from single NVs to hydrogen spins outside the diamond. However, the scaling up of these results to the use of a dense NV ensemble, which is a necessary prerequisite for achieving realistic NMR sensitivity enhancement, has not yet been demonstrated. In this work, we present evidence for a polarising interaction between a shallow NV ensemble and external nuclear targets over a micrometre scale, and characterise the challenges in achieving useful polarisation enhancement. In the most favourable example of the interaction with hydrogen in a solid state target, a maximum polarisation transfer rate of $\approx 7500$ spins per second per NV is measured, averaged over an area containing order $10^6$ NVs. Reduced levels of polarisation efficiency are found for liquid state targets, where molecular diffusion limits the transfer. Through analysis via a theoretical model, we find that our results suggest implementation of this technique for NMR sensitivity enhancement is feasible following realistic diamond material improvements. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevApplied.15.054052 |
| URL الوصول: | http://arxiv.org/abs/2101.12325 |
| رقم الأكسشن: | edsarx.2101.12325 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevApplied.15.054052 |
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