基于频域干涉法测量激光加载亚微米铝膜的冲击参数  

Shock Parameter Measurement of Sub-Micrometer Aluminum Driven by Laser Using Frequency Domain Interferometer

作　　者：陶天炯[1] 翁继东[1] 王翔[1] 刘盛刚[1] 马鹤立[1] 李成军[1] 贾兴[1] 陈龙 吴建 唐隆煌 陈永超 TAO Tianjiong;WENG Jidong;WANG Xiang;LIU Shenggang;MA Heli;LI Chengjun;JIA Xing;CHEN Long;WU Jian;TANG Longhuang;CHEN Yongchao(National Key Laboratory of Shock Wave and Detonation Physics,Institute of Fluid Physics,CAEP,Mianyang 621999,Sichuan,China)

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理全国重点实验室,四川绵阳621999

出　　处：《高压物理学报》2025年第4期1-8,共8页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(U2241276)。

摘　　要：针对镀于石英上的亚微米铝膜样品,将飞秒激光(脉宽35 fs、能量0.5 mJ、中心波长800 nm)聚焦其表面,通过激光烧蚀引起铝的快速热膨胀,驱动冲击波传播,使铝样品获得高压加载。透过铝样品背面的石英窗口,采用频域干涉技术,同时测量了冲击径向位移轮廓、粒子速度和冲击波传播速度。通过监测脉冲能量和打靶位置,提高了多发次实验的重复性。采用相位比较算法对实验数据进行分析,实现了亚纳米级的位移分辨率和亚皮秒级的时间分辨率,成功地获得了铝膜在约130 GPa压力下的界面冲击轮廓演化历史。For aluminum films with submicron thickness deposited on quartz substrates,femtosecond laser pulses(35 fs pulse width,0.5 mJ energy,and a central wavelength of 800 nm)were focused on the surface to induce rapid thermal expansion through laser ablation.This process generated shock wave propagation and achieved high-pressure loading on the aluminum samples.Through the quartz window on the backside of the aluminum sample,frequency-domain interferometry was employed to simultaneously measure shock-induced radial displacement profiles,particle velocities,and shock wave propagation velocities.Experimental repeatability for multiple shots was enhanced through pulse energy and shock position monitoring.A phase comparison algorithm was applied for data analysis,achieving sub-nanometer displacement resolution and sub-picosecond temporal resolution.This methodology successfully captured the interfacial shock profile evolution history in the aluminum film under approximately 130 GPa of pressure.

关 键 词：冲击波 飞秒激光 频域干涉 物态方程 

分 类 号：O521.3[理学—高压高温物理] O433.1[理学—物理]