论文标题
高氮呈浓度在钻石的光致发光和拉曼光谱上的作用
Role of high nitrogen-vacancy concentration on the photoluminescence and Raman spectra of diamond
论文作者
论文摘要
我们介绍了具有高浓度的氮气胶囊（NV）颜色的各种钻石样品的光致发光（PL）和拉曼光谱研究，中心高达每百万份（PPM）。 With green red, and near infrared (NIR) light excitation, we demonstrate that while for samples with a low density of NV centers the signals are primarily dominated by Raman scattering from the diamond lattice, for higher density of NVs we observe a combination of Raman scattering from the diamond lattice and fluorescence from the NV centers, while for the highest NV densities the Raman signals from diamond are completely overwhelmed by the强烈的NVS荧光。但是，在NIR激发下，可以观察到一些钻石的拉曼钻石特征。这些观察结果揭示了两种光发射机制的不同作用，并与天真的信念相矛盾：拉曼散射能够完全表征钻石晶体样品。
We present a photoluminescence (PL) and Raman spectroscopy study of various diamond samples that have high concentrations of nitrogen-vacancy (NV) color centers up to multiple parts per million (ppm). With green red, and near infrared (NIR) light excitation, we demonstrate that while for samples with a low density of NV centers the signals are primarily dominated by Raman scattering from the diamond lattice, for higher density of NVs we observe a combination of Raman scattering from the diamond lattice and fluorescence from the NV centers, while for the highest NV densities the Raman signals from diamond are completely overwhelmed by the intense NVs fluorescence. However, under NIR excitation, Raman diamond signatures can be observed for some diamonds. These observations reveal different roles of two mechanisms of light emission and contradict the naive belief that Raman scattering enables complete characterisation of a diamond crystalline sample.
