利用磁控溅射法在K9玻璃基底上制备了Ag8In14Sb55Te23(AIST)纳米薄膜,并利用激光抽运-探测技术测量了薄膜的时间分辨反射率变化特性。研究结果表明,在合适能量密度的单脉冲纳秒激光脉冲作用下,AIST薄膜可以快速从沉积非晶态转化为晶态结构,晶化过程包含中间熔化态。在较低能量密度范围内,反射率变化量和晶化时间都随能量密度变化呈线性增加趋势。 Ag8In14Sb55Te23 (AIST) nanofilms were prepared on a K9 glass substrate by magnetron sputtering. The time-dependent reflectivity of the films was measured by laser pumping-detection. The results show that the AIST thin film can rapidly transform from amorphous to crystalline structure under the single-pulse nanosecond laser pulse with appropriate energy density, and the crystallization process includes the intermediate melting state. In the range of lower energy density, both the variation of reflectivity and the crystallization time increase linearly with the variation of energy density.