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单射子皮秒超快显微镜成像利用空间频率多重复合用于超快激光诱导的等离子体可视化
Hang Li1,2, Yahui Li1,2, Yang Shang1,2
1State Key Laboratory of Ultrafast Optical Science and Technology, Xi'an Institute of Optics and Precision Mechanics, Xi'an 710119, China.
Nanomaterials (Basel, Switzerland)
|September 26, 2025
概括
这项研究引入了一种新的超快速成像技术,用于捕捉激光处理期间的动态微/纳米结构演变. 该方法提高了空间分辨率,克服了先进制造研究之前的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 光学工程是指光学工程.
- 物理 物理学 物理
背景情况:
- 超快的激光加工可以创建微型/纳米结构,这对先进制造至关重要.
- 超快激光诱导的事件涉及非平衡动态在femtosecond到picosecond时间尺度.
- 单拍超快速成像提供小于皮秒的时间分辨率,但往往牺牲空间分辨率.
研究的目的:
- 开发一种改进的单拍超快速成像方法,具有增强的空间分辨率.
- 为了克服短暂事件的显微镜成像中的空间分辨率瓶.
- 为了能够详细观察超快激光物质相互作用.
主要方法:
- 提出了一种使用结构化照明的空间频率复杂化方法.
- 开发了一种利用富里埃域联对称的重建策略.
- 构建了一个具有300 fs间隔的两显微系统.
主要成果:
- 拟议的重建策略与传统算法相比,将空间分辨率提高了一倍.
- 该方法实现了接近衍射极限的空间分辨率.
- 证明了1.4μm的最大空间分辨率.
- 激光与化二氧化相互作用诱导的等离子体的动态进化被一次性捕获.
结论:
- 开发的成像技术显著提高了超快现象的空间分辨率.
- 该方法可用于研究超快激光处理和材料相互作用.
- 为完善激光物质相互作用的理论模型提供了有价值的实验数据.
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