Nitrogen centers in single crystal diamond grown by chemical vapor deposition

The single crystals of diamond grown by chemical vapor deposition (CVD) are getting wider acceptance in the market for gem purposes and various other applications. Most popular applications gems, particle detectors, high pressure anvils, laser windows. It is widely accepted that, unless specifically made, CVD type IIa, which implies that they have a nitrogen concentration less than 5 ppm diamond. crystal serious deterrent certain such as threshold these specific subparts per billion (less 1 ppb). On hand, diamonds gems could hold million ppm) range would still qualify excellent gems. In this paper, an attempt made to understand nature two types diamonds: one shows very week fluorescence PL spectrum (light color or white color) with low strong (brown dark brown color). correlation different forms vacancy centers studied. results indicate relationship exists concentrations (NVH)0 NS+ diamonds.