Journal
APPLIED PHYSICS LETTERS
Volume 107, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4935709
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Funding
- JST-CREST
- MEXT/JSPS KAKENHI [26630125, 25289086]
- Grants-in-Aid for Scientific Research [26630125, 25289086, 14J10949] Funding Source: KAKEN
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Selective alignment of nitrogen-vacancy (NV) centers in diamond is an important technique towards its applications. Quantification of the alignment ratio is necessary to design the optimized diamond samples. However, this is not a straightforward problem for dense ensemble of the NV centers. We estimate the alignment ratio of ensemble NV centers along the [111] direction in (111) diamond by optically detected magnetic resonance measurements. Diamond films deposited by N-2 doped chemical vapor deposition have NV center densities over 1 x 10 15 cm(-3) and alignment ratios over 75%. Although spin coherence time (T-2) is limited to a few ls by electron spins of nitrogen impurities, the combination of the selective alignment and the high density can be a possible way to optimize NV-containing diamond samples for the sensing applications. (C) 2015 AIP Publishing LLC.
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