Local and bulk (13)C hyperpolarization in nitrogen-vacancy-centred diamonds at variable fields and orientations
| Autor: | Junichi Isoya, Gonzalo A. Álvarez, Hisao Kanda, David Gershoni, Paz London, Lucio Frydman, Christian O. Bretschneider, Shinobu Onoda, Ran Fischer |
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| Rok vydání: | 2014 |
| Předmět: |
Physics
Free electron model Multidisciplinary Spins Condensed matter physics General Physics and Astronomy Diamond Nanotechnology 02 engineering and technology General Chemistry engineering.material 021001 nanoscience & nanotechnology 01 natural sciences General Biochemistry Genetics and Molecular Biology Article Magnetic field Vacancy defect 0103 physical sciences engineering Energy level Hyperpolarization (physics) 010306 general physics 0210 nano-technology Microwave |
| Zdroj: | Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Polarizing nuclear spins is of fundamental importance in biology, chemistry and physics. Methods for hyperpolarizing 13C nuclei from free electrons in bulk usually demand operation at cryogenic temperatures. Room temperature approaches targeting diamonds with nitrogen-vacancy centres could alleviate this need; however, hitherto proposed strategies lack generality as they demand stringent conditions on the strength and/or alignment of the magnetic field. We report here an approach for achieving efficient electron-13C spin-alignment transfers, compatible with a broad range of magnetic field strengths and field orientations with respect to the diamond crystal. This versatility results from combining coherent microwave- and incoherent laser-induced transitions between selected energy states of the coupled electron–nuclear spin manifold. 13C-detected nuclear magnetic resonance experiments demonstrate that this hyperpolarization can be transferred via first-shell or via distant 13Cs throughout the nuclear bulk ensemble. This method opens new perspectives for applications of diamond nitrogen-vacancy centres in nuclear magnetic resonance, and in quantum information processing. Hyperpolarization of nuclear spins for enhancing the sensitivity of magnetic resonance can typically be achieved at low temperatures. Here, the authors demonstrate room-temperature polarization of 13C derived from optically pumped electrons of nitrogen vacancies in diamonds with arbitrary orientations. |
| Databáze: | OpenAIRE |
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