Discrimination between natural and HPHT-treated type IIa diamonds using photoluminescence spectroscopy

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• 作者：Hyunjin Lim ; Sooyoun Park ; Hyeonsik Cheong ; Hyun-Min Choi ; Young Chool Kim
• 关键词：Diamond crystal ; High pressure high temperature (HPHT) ; Optical emission ; Optical properties characterization ; Impurities ; Optical properties
• 刊名：Diamond and Related Materials
• 出版年：2010
• 出版时间：October 2010
• 年：2010
• 卷：19
• 期：10
• 页码：1254-1258
• 全文大小：860 K

文摘

We have performed low-temperature (8 K) photoluminescence (PL) measurements on 71 natural and 12 high-pressure-and-high-temperature (HPHT)-treated type IIa diamonds. The GR1, NV⁰, NV⁻, H4, and H3 defect center PL signals are compared. Some distinct differences in the PL lineshape, intensity, and appearance of side-band PL signals are observed. Furthermore, we processed 6 of the natural diamond samples with the HPHT treatment to investigate the effect of the treatment on the PL spectrum. By systematically analyzing the differences in the PL spectra, we developed a scheme to discriminate natural and HPHT-treated diamonds with 99 % validity.