圆形瞳孔共聚焦布里卢恩-拉曼显微镜用于高光谱分辨率的多信息映射
Yunhao Su1, Hanxu Wu2, Lirong Qiu1
1MIIT Key Laboratory of Complex-field Intelligent Exploration, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China.
Nanophotonics (Berlin, Germany)
|December 5, 2024
概括
一种新的环状瞳孔对焦布里卢恩-拉曼显微镜 (APCBRM) 提高了材料分析的光谱和空间分辨率. 这种技术可以提高布里卢因光谱分辨率和布里卢因和拉曼光谱学的侧面分辨率.
科学领域:
- 频谱学是一种光谱学.
- 显微镜的使用方法
- 材料科学 材料科学 材料科学
背景情况:
- 布里卢恩-拉曼联合共聚焦光谱法提供了对材料性质的非接触分析.
- 目前光谱和空间分辨率的局限性阻碍了先进的应用.
- 高数字孔径的目标会导致光谱扩大,降低Brillouin光谱分辨率.
研究的目的:
- 提出并演示一个环状瞳孔共聚焦布里卢恩-拉曼显微镜 (APCBRM) 方案.
- 为了实现同时实现高光谱分辨率Brillouin检测和高侧面分辨率映射.
- 为了使3D地形绘制能够与化学和机械性能分析一起进行.
主要方法:
- 在共聚焦的布里卢恩-拉曼显微镜中实现圆形瞳孔.
- 利用环状瞳孔来抑制光谱扩大和压缩激发点.
- 采用高精度共聚焦聚焦系统,用于实时扫描和3D地形.
主要成果:
- 实现了全宽度在Brillouin光谱的最大一半时减少22.1%,提高了光谱分辨率.
- 增加了侧面分辨率,达到Brillouin的约353.2nm和拉曼光谱的347.1nm.
- 演示了同时高侧面和布里卢恩光谱分辨率,以及3D地形绘图.
结论:
- 该APCBRM方案显著提高了联合光谱学中的光谱和空间分辨率.
- APCBRM为详细的材料表征提供了一个强大的工具.
- 潜在的应用范围包括新材料,精密加工和生物医学成像.
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