首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Stress dependence of sapphire cathodoluminescence from optically active oxygen defects as a function of crystallographic orientation
【24h】

Stress dependence of sapphire cathodoluminescence from optically active oxygen defects as a function of crystallographic orientation

机译:光学活性氧缺陷对蓝宝石阴极发光的应力依赖性与晶体取向的关系

获取原文
获取原文并翻译 | 示例
           

摘要

The cathodoluminescence (CL) spectrum of the synthetic sapphire single crystal has been studied with respect to the different crystallographic planes of the crystal in order to describe the tensorial stress dependence of the band related to oxygen defects. Experiments provide the link between CL spectral shift and stress, which is referred to as the piezo-spectroscopic (PS) relationship. Using the biaxial stress field developed at the tip of cracks generated from the corners of a Vickers indentation, we clearly detected stress dependence for the cumulative band arising from the F+-center transition of optically active oxygen vacancies. The matrix of PS coefficients along different crystallographic axes of single-crystal sapphire could be precisely determined. The shallow nature of the electron probe may enable the characterization of surface stress fields with a spatial resolution that may not be easily available by conventional laser probes. The PS calibration results collected on oxygen-defect bands allow the direct determination of unknown surface residual stress fields stored in sapphire substrates for electronics applications.
机译:为了描述与氧缺陷有关的能带的张应力相关性,已经针对晶体的不同晶体学面研究了合成蓝宝石单晶的阴极发光(CL)光谱。实验提供了CL光谱位移和应力之间的联系,这被称为压电光谱(PS)关系。使用在维氏压痕的拐角处产生的裂纹尖端处产生的双轴应力场,我们清楚地检测到了由光学活性氧空位的F +中心跃迁引起的累积带的应力依赖性。可以精确确定沿单晶蓝宝石不同晶轴的PS系数矩阵。电子探针的浅性质可以使得具有空间分辨率的表面应力场的表征成为可能,这是常规激光探针可能不容易获得的。通过在氧缺陷带上收集的PS校准结果,可以直接确定存储在用于电子应用的蓝宝石衬底中的未知表面残余应力场。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号