Journal
APPLIED PHYSICS LETTERS
Volume 95, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3238467
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- European Commission [IST-034368]
- NED-QIT
- RTRA
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We investigate the electron spin resonance of an ensemble of nitrogen-vacancy (NV) color centers in a bulk diamond crystal. The four possible orientations of the NV center in the lattice lead to different dependences on the magnitude and the orientation of an external static magnetic field. Experimental results obtained with a continuous microwave excitation are in good agreement with simulations. In addition, we observe that the average radiative lifetime of the NV color center is also modified when the external magnetic field is applied. This variation is explained by the mixing between m(S)=0 and m(S)=+/- 1 spin states of the NV center with different radiative lifetimes, due to magnetic coupling. These results are of interest for a broad range of applications, such as spin-resonance-based magnetometry with a high-density ensemble of NV centers. (C) 2009 American Institute of Physics. [doi:10.1063/1.3238467]
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