Bulk Nuclear Polarization Enhanced at Room-Temperature by Optical Pumping
| Autor: | Dmitry Budker, Lucio Frydman, Christian O. Bretschneider, David Gershoni, Ran Fischer, Paz London |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Materials science
FOS: Physical sciences General Physics and Astronomy 02 engineering and technology engineering.material 01 natural sciences Optical pumping Physics - Chemical Physics 0103 physical sciences Thermal Hyperpolarization (physics) 010306 general physics Chemical Physics (physics.chem-ph) Quantum Physics business.industry Diamond 021001 nanoscience & nanotechnology Polarization (waves) 3. Good health Magnetic field engineering Optoelectronics Atomic physics Quantum Physics (quant-ph) 0210 nano-technology business |
| Popis: | Bulk 13C polarization can be strongly enhanced in diamond at room-temperature based on the optical pumping of nitrogen-vacancy color centers. This effect was confirmed by irradiating suitably aligned single-crystals at a ~50 mT field promoting anti-crossings between electronic excited-state levels, followed by shuttling of the sample into a custom-built NMR setup and by subsequent 13C detection. A nuclear polarization of ~0.5% - equivalent to the 13C polarization achievable by thermal polarization at room temperature at fields of ~2000 T - was measured, and its bulk nature determined based on line shape and relaxation measurements. Positive and negative enhanced polarizations were obtained, with a generally complex but predictable dependence on the magnetic field during optical pumping. Owing to its simplicity, this 13C room-temperature polarizing strategy provides a promising new addition to existing nuclear hyperpolarization techniques. Main text: 6 pages, 3 figures. Supplementary: 7 pages, 4 figures |
| Databáze: | OpenAIRE |
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