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. 2010 Apr 19;107(19):8513–8518. doi: 10.1073/pnas.1003052107

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Fig. 1. — Multiplet structure of the NV^-1 center in diamond. A 1.945-eV spin-conserving optical transition exists between the ground- () and excited- (³E) state triplets. Transitions from the m_s = ± 1 sublevels of ³E to an intermediate spin singlet () are much stronger than those from the m_s = 0 sublevel. The spin-selective nature of this decay path can be used in conjunction with the 1.945 eV transition to optically polarize and measure the spin state of .

Inline graphic — Multiplet structure of the NV^-1 center in diamond. A 1.945-eV spin-conserving optical transition exists between the ground- () and excited- (³E) state triplets. Transitions from the m_s = ± 1 sublevels of ³E to an intermediate spin singlet () are much stronger than those from the m_s = 0 sublevel. The spin-selective nature of this decay path can be used in conjunction with the 1.945 eV transition to optically polarize and measure the spin state of .