金刚石集群NV色心的光谱特征及浓度定量分析

发布时间：2018-03-04 13:30

  本文选题：NV色心　切入点：荧光光谱　出处：《光谱学与光谱分析》2017年05期 　论文类型：期刊论文

【摘要】：金刚石NV-色心具有优越的光致发光特性,可实现高灵敏度物理量探测。其中,NV-色心的浓度是影响其宏观领域物理量探测灵敏度的重要因素之一。分析了金刚石在NV-色心制备过程中产生的发光缺陷,研究了不同的电子注入剂量与NV-色心浓度的关系。首先,对金刚石进行电子辐照并高温真空退火,制备了NV-色心;然后,利用拉曼光谱仪测试了金刚石在电子辐照前、电子辐照后及退火后三个阶段中的荧光光谱,分析了金刚石在NV-色心制备过程中的光谱特性;最后,对生成的NV-色心的浓度进行了估算,并探究了不同电子注入剂量对NV-色心浓度的影响规律。结果表明,金刚石经电子注入后生成了524.7,541.1,578和648.1nm发光中心。其中,HPHT合成金刚石经电子注入后普遍存在524.7nm中心。电子注入后的金刚石经高温(≥800℃)真空(≥10-7 Pa)退火后,空位自由移动,不稳定的缺陷消失,当空位靠近氮原子时被束缚而形成氮空位色心。对于氮含量100ppm的金刚石,当电子注入产生的空位含量小于120ppm(2.1×1019 cm-3)时,NV-色心浓度与电子注入生成空位的含量的关系符合Boltzmann分布。该研究为利用氮含量100ppm的金刚石实现定量NV-色心浓度的制备提供了参考依据,为NV-色心在宏观物理量精密测量的应用奠定了基础。
[Abstract]:Diamond NV- color center has excellent photoluminescence properties, High sensitivity physical quantity detection can be realized. The concentration of NV- color center is one of the important factors that affect the detection sensitivity of physical quantity in macroscopical field. The luminescence defects of diamond in the preparation of NV- color center are analyzed. The relationship between different electron implantation doses and NV- color center concentration was studied. Firstly, the NV- color center was prepared by electron irradiation and vacuum annealing at high temperature, and then the diamond was measured by Raman spectroscopy before electron irradiation. After electron irradiation and annealing, the spectral characteristics of diamond in the preparation of NV- color center were analyzed. Finally, the concentration of the generated NV- color center was estimated. The effects of different electron implantation doses on NV- color center concentration were investigated. After electron implantation, 524.7Nm and 648.1nm photoluminescence centers were formed in diamond. There are 524.7 nm centers in diamond synthesized by HPHT. After annealing at high temperature (鈮，

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