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Optical properties of the nitrogen-vacancy singlet levels in diamond

2010; American Physical Society; Volume: 82; Issue: 20 Linguagem: Inglês

10.1103/physrevb.82.201202

1550-235X

Víctor M. Acosta, Andrey Jarmola, Erik Bauch, Dmitry Budker,

High-pressure geophysics and materials

We report measurements of the optical properties of the 1042 nm transition of negatively charged nitrogen-vacancy (NV) centers in type-1b diamond. The results indicate that the upper level of this transition couples to the ${m}_{s}=\ifmmode\pm\else\textpm\fi{}1$ sublevels of the $^{3}E$ excited state and is short lived with a lifetime of $\ensuremath{\lesssim}1\text{ }\text{ns}$. The lower level is shown to have a temperature-dependent lifetime of 462(10) ns at 4.4 K and 219(3) ns at 295 K. The light-polarization dependence of 1042 nm absorption confirms that the transition is between orbitals of ${A}_{1}$ and $E$ character. The results shed light on the NV level structure and optical pumping mechanism.