Fig. 4: ODMR contrast of a single TR12 center.
From: TR12 centers in diamond as a room temperature atomic scale vector magnetometer

Simulated optically detected magnetic resonance contrast as a function of the magnetic field orientation for TR12 (multicolored) and nitrogen-vacancy (red) for 30 mT. The figure displays the second highest optically detected magnetic resonance contrast of all three transitions available. The orientation of the TR12 metastable triplet is indicated by colored arrows.