脉冲激光诱导Cu靶产生发光羽的特性分析

通过在不同的环境气压下拍摄脉冲激光烧蚀金属Cu诱导产生的发光羽,获取了不同区域具有不同颜色特征的发光羽照片.结果发现:发光羽的颜色随环境气压的改变而变化.采用空间分辨光谱技术,测定了激光诱导金属Cu靶产生发光羽辐射强度的空间分布,以及不同烧蚀环境气压对发光羽辐射强度的影响.研究了脉冲激光烧蚀Cu表面诱导发光的动力学过程,建立了可能的发光羽分区模型,对发光羽的不同区域发光粒子的激发机理进行了探讨,并用之定性地解释了所观察的实验现象.结果分析表明:脉冲激光诱导Cu产生的发光羽可以分为三个区域,不同区域的发光机理不同,Cu原子和Cu离子的激发机理不完全相同.

The Properties Analysis of Plume Produced by Pulsed Laser Ablation of Metal Cu

The plume photograph from laser ablation of metal Cu in different Ar pressure was taken,and it has different colour in different region.The effect of pressure over 265 kPa-98.2 kPa on plume colour was studied.Spatial-resolved spectral measurment technique was used to study the spatial emission intensity distributions of plume by pulsed laser ablation of metal Cu in different pressure.The excimer dynamics of laser ablation of Cu surface was studied,the microscopic excimer mechanism of laser laser ablation of Cu surface was discussed.The results show that the plume may be explained using a simple model based on plume is made of three region,the region ablation mechanism is different from one another,the excited Cu atoms and Cu ions may be produced from different mechanism.The model can be used to explain the experimental results qualitatively.