Optical Characteristics of Nano-Polycrystalline Diamond Synthesized Directly from Graphite under High Pressure and High Temperature
Optical Characteristics of Nano-Polycrystalline Diamond Synthesized Directly from Graphite under High Pressure and High Temperature
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DOI：
10.1143/jjap.48.120206
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发表时间：
2009-12
影响因子：
1.5
通讯作者：
H. Sumiya;K. Harano;Keiko Arimoto;H. Kagi;Shoko Odake;T. Irifune
中科院分区：
文献类型：
--
作者：
H. Sumiya;K. Harano;Keiko Arimoto;H. Kagi;Shoko Odake;T. Irifune
通过红外（IR）、紫外（UV）和光致发光（PL）光谱研究了在高压和高温下由高纯石墨直接转化合成的纳米多晶金刚石（NPD）的光学性质。红外光谱显示NPD没有大的晶格应变和很少的杂质，但具有归因于痕量六方金刚石的吸收带。由于结构缺陷和聚集氮的电子跃迁导致的二次吸收边，紫外光谱显示出连续的吸收翼。 PL 光谱显示出 N3 中心的峰和与位错相关的宽带。
Optical properties of nano-polycrystalline diamond (NPD) synthesized by direct conversion from high-purity graphite under high pressure and temperature were investigated by infrared (IR), ultraviolet (UV), and photoluminescence (PL) spectroscopy. IR spectroscopy revealed that NPD has no large lattice strain and very few impurities, but possesses an absorption band attributed to a trace of hexagonal diamond. UV spectra displayed a continuous absorption wing due to structural defects and secondary absorption edge attributed to electron transitions from aggregated nitrogen. PL spectra exhibited peaks of N3 centers and broad bands related to dislocations.