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定量预测无热带层材料的角度分辨率偏振拉曼强度

Jia-Liang Xie^1,2, Tao Liu^1,2, Yu-Chen Leng¹

¹State Key Laboratory of Semiconductor Physics and Chip Technologies, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China.

Advanced materials (Deerfield Beach, Fla.)

|July 16, 2025

概括

现在可以预测 anisotropic layered materials (ALMs) 的角度分辨率极化拉曼 (ARPR) 光谱. 这项研究引入了内在的拉曼张量来准确预测ARPR强度,简化了ALM光学属性的分析.

科学领域:

凝聚物质物理学凝聚物质物理学
材料科学材料科学材料科学
频谱学是一种光谱学.

背景情况:

角度分辨率偏振拉曼 (ARPR) 光谱揭示了光学异构性和电子音声合在异构性层层材料 (ALM).
在ALM中ARPR反应是复杂的,显示出对片厚度,激发波长和介电环境的令人费解的依赖.
现有的方法难以准确预测ALM的ARPR强度概况.

研究的目的:

开发ALM片中的ARPR强度的预测框架.
为准确的ARPR分析引入内在拉曼张量 (Rint).
在ARPR预测中考虑诸如双折射,线性二重化和多层干扰等因素.

主要方法:

介绍了内在的拉曼张量 (Rint) 和有效的拉曼张量 (Reff).
用实验确定了飞机内轴的复杂折射率.
衍生 Reff 元素以定量预测 ARPR 强度.
将框架应用于黑 (BP) 和四层Td-WTe2片.

主要成果:

成功预测了不同厚度的ALM片的ARPR强度概况.
证明了ARPR强度对ALM厚度,介电基板和激发波长的复杂依赖.
开发的框架准确地解释了光学现象,如双折射和多层干扰.

结论:

拟议的框架可以准确预测ALM片的ARPR强度.
这种方法简化了ALM中ARPR反应的理解和预测.
该框架可扩展到各种ALM厚度,从薄层到散装限制.

关键词:

角分辨率极化拉曼强度的角度分辨率.不同类型的分层材料是异型的.复杂的拉曼张量复杂的折射率指数复杂的折射率指数.光学异构性是指光学异构性.

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