通过纳焦量级的飞秒激光在铬膜表面诱导出了周期性微结构,并使用入射飞秒激光和激发的表面等离子体波之间的干涉理论模拟分析了飞秒激光作用下铬膜表面的温度场分布情况,定性地解释了铬膜表面周期性微结构产生的机理。实验和理论结果有助于对飞秒激光和铬膜相互作用机制的理解。

The surface periodic microstructures on chromium film were induced by the nanojoule femtosecond laser. We analyzed the distribution of temperature on the chromium film surface with the theory of interference between the incident laser and the excited surface plasmons wave and the principles of periodic surface structures were explained. Experimental results are in coincidence with numerical simulation. The periodic microstructures formed on the chromium film should be helpful for us to understand the physical mechanism of the interaction between the chromium film and the femtosecond laser.