Abstract

We report the observation of cw four-wave mixing and phase conjugation in the UV on the N3 color-center resonance in diamond. Using a jitter-free technique, the nearly degenerate four-wave mixing spectrum has been measured and the ultranarrow, 250-Hz-wide resonance analyzed to understand the metastable-state decay process responsible for the low quantum efficiency and large nonlinear susceptibility of this aggregated nitrogen structure. The results establish the existence and lifetime of a new excited state of the defect.

© 1988 Optical Society of America

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