Laser action at 530 nm using H3 centers in diamond was observed with an efficiency of 13.5% at room temperature. Optical double-resonance experiments on N3 centers provided direct evidence for a (2)A metastable level. Its presence results in rapid decay of the excited (2)E state and low quantum efficiency as well as significant excited-state absorption in the N3 luminescence region.
No takes yet. Share an insight, caveat, or question.
Rand et al. (1985) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: