Dynamics of colliding laser ablation plumes in background gas

作者：Umezu Ikurou^*; Hashiguchi Yusuke; Fukuoka Hiroshi; Sakamoto Naomichi; Aoki Tamao; Sugimura Akira

来源：Applied Physics A-Materials Science & Processing, 2016, 122(4): 485.

DOI：10.1007/s00339-016-9993-y

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 time t(d). When t(d) is larger than a few mu s, 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 increasing t(d), and rapid decrease at around t(d) = 60 mu s is observed. These results indicate that non-luminescent Si atomic species exist between targets up to about t(d) = 60 mu s and effects of the collision rapidly decrease at above about t(d) = 60 mu s. Effects of the collision of Si and Ge plumes and the re-emission of quenched Si atomic species are discussed.

• 出版日期2016-4