Dynamics of colliding laser ablation plumes in background gas
Dynamics of colliding laser ablation plumes in background gas
复制标题
背景气体中碰撞激光烧蚀羽流的动力学
DOI：
10.1007/s00339-016-9993-y
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Akira Sugimura
中科院分区：
文献类型：
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作者：
Ikurou Umezu;Yusuke Hashiguchi;Hiroshi Fukuoka;Naomichi Nakamoto;Tamao Aoki;Akira Sugimura
在脉冲激光烧蚀背景气体中，观察到两束羽流迎面碰撞时羽流膨胀的动力学过程，先照射Si靶，再延迟照射Ge靶。当大于几μs时，Si羽流发射在Ge靶辐照前熄灭。观察到猝灭的Si原子与Ge羽碰撞产生的再发射。Si再发射强度和寿命随td的增加而减小，在td = 60 μs左右，再发射强度和寿命迅速减小。这些结果表明，在td = 60 μ s左右，靶与靶之间存在不发光的Si原子物种，当td = 60 μs以上时，碰撞效应迅速减弱。讨论了Si和Ge羽流碰撞和猝灭Si原子再发射的影响。
We observed plume expansion dynamics during pulsed laser ablation in background gas when two plumes collided head-on. The Si target is irradiated followed by the Ge target with delay timetd. Whentdis larger than a few μs, the Si plume emission quenches before the irradiation of the Ge target. Re-emission of quenched Si atomic species by the collision with counter Ge plume is observed. The intensity and lifetime of Si re-emission decrease with increasingtd, and rapid decrease at aroundtd= 60 μs is observed. These results indicate that non-luminescent Si atomic species exist between targets up to abouttd= 60 μs and effects of the collision rapidly decrease at above abouttd= 60 μs. Effects of the collision of Si and Ge plumes and the re-emission of quenched Si atomic species are discussed.