Use of Optical Spectroscopy Methods to Determine the Solubility Limit for Nitrogen in Diamond Single Crystals Synthesized by Chemical Vapor Depositionстатья
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Дата последнего поиска статьи во внешних источниках: 5 сентября 2016 г.
Аннотация:We have studied the upper limits for incorporation of nitrogen and formation of arrays of nitrogen-vacancy (NV) color centers in optical-quality single-crystalline diamond synthesized by chemical vapor deposition (CVD). The CVD diamond samples were grown in a microwave plasma in methane-hydrogen mixtures with high content (200-2000 ppm) of the nitrogen dopant in the gas mixture, and were analyzed using Raman and photoluminescence spectroscopy. From the UV absorption spectra, we established that the solubility limit for substitutional nitrogen in the studied material is close to 2 center dot 10(18) cm(-3) (under typical synthesis conditions), which lets us in particular form arrays of NV center with similar concentrations by means of irradiation and annealing.