介绍了使用近阈值飞秒激光（脉宽130 fs，中心波长800 nm）烧蚀高定向热解石墨（HOPG）的实验，研究了激光强度与烧蚀深度、激光强度与烧蚀面积之间的关系，计算得到石墨的烧蚀阈值为0.44 J/cm2。使用SEM观察样品表面的烧蚀凹坑，发现两种不同的周期性纳米结构，其周期分别为400 nm和100 nm左右。通过改变脉冲数量、激光能量等参数，分析了各种结构的形成条件。

Experiment of femtosecond laser ablation of highly-ordered pyrolytic graphite is performed. Ablation depth and area are investigated as a function of incident energy. The calculated ablation threshold is 0.44 J/cm2. Two different periodic nanostructures are obtained after laser ablation at a wavelength of 800 nm and a duration of 130 fs, including a low-spatial-frequency structure with period of about 400 nm and a high-spatial-frequency with period of about 100 nm. Formation conditions of the nanostructures are analyzed by changing the parameters such as laser energy and pulse number.