Physics – Condensed Matter – Materials Science
Scientific paper
2009-08-10
Physics
Condensed Matter
Materials Science
14 pages, published on Applied Physics Letters journal
Scientific paper
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 mS = 0 and mS = $\pm$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
Jelezko Fedor
Lai Ngoc Diep
Roch Jean-Francois
Treussart Francois
Zheng Dingwei
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