飞秒激光作用在材料表面造成形态学变化，可以大大改变材料的物理性质。但目前已有的研究还未能获得激光作用时完整的物质形态响应过程。针对该问题，美国罗切斯特大学郭春雷教授的研究团队开发了一种超快光学成像技术。

The femtosecond (fs) laser-induced surface morphology change often drastically alters a material’s physical prop-erties. But the existing research has not yet been able to observe a complete evolution of the material during fs laser-material interactions. For this problem, Professor Guo Chunlei from the University of Rochester, USA de-veloped an ultrafast optical imaging technique.