小面积钻石样本的高精度[R,T]光学表征通过定制的双光束样本持有器进行
David V Tsu1, Alex Ho2, Nina Baule2
1Ming Scientific, Oro Valley, Arizona 85737, USA.
The Review of scientific instruments
|January 21, 2026
概括
一个新的样品持有系统可以对小钻石样品进行精确的光学测量. 这种方法准确地确定光学常数和材料特性,为生长物理和材料质量提供了新的见解.
科学领域:
- 材料科学 材料科学 材料科学
- 光学物理学 光学物理学
- 纳米技术纳米技术
背景情况:
- 准确的光学特征小,高光密度的材料,如钻石是具有挑战性的.
- 现有的方法通常依赖于间接测量或曲线拟合,限制精度和物理洞察力.
- 双射线光谱光度测量需要专门的设置,以便在微尺度样本上进行高准确度测量.
研究的目的:
- 开发一个定制的样品持有系统 (SHS),用于对小钻石样品进行高准确度反射率和传导率 ([R,T]) 测量.
- 为了使材料属性的直接光学检索,而无需依赖曲线适配.
- 证明系统对生长物理和材料质量进行非破坏性分析的能力.
主要方法:
- 一个定制的样本持有系统 (SHS) 设计用于精密对齐和扭曲取消在双束光谱光度学.
- 使用参考材料和光圈校正,实现了百分比以下的绝对光度准确度.
- 牛顿-拉普森 (N-R) 方法用于直接反转[R,T]数据以提取光学常数[n,k]和物理参数.
- 分析边缘行为,包括p和m分支交叉,用于确定厚度,粗度和不均性.
主要成果:
- 对于3-7毫米钻石样本的[R,T]测量,SHS实现了百分比以下的光度准确性.
- 对光学常数[n,k]的直接反转没有进行曲线拟合.
- 与质量增益测量相比,添加钻石 (BDD) 薄膜的厚度差异减少了3倍以上.
- 在[n,k]中确定了载体密度梯度和波纹状不连续性,与生长物理相关,并使有效孔质量,载体寿命和兴奋剂配置文件的检索成为可能.
结论:
- 开发的SHS和反转方法为小型高光密度材料的非破坏性纳米尺度表征提供了强大的工具.
- 该方法揭示了在光学数据中编码的隐藏生长物理,超越了被动测量,进入了活性材料分析.
- 这种反转意识的计量学增强了结构验证,诊断清晰度和先进材料系统的过程洞察力.
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