Observation of femtosecond-laser-induced ablation plumes of aluminum using space- and time-resolved soft x-ray absorption spectroscopy

被引：21
作者：
Okano, Yasuaki [1 ]
Oguri, Katsuya [1 ]
Nishikawa, Tadashi [1 ]
Nakano, Hidetoshi [1 ]
机构：
[1] NTT Corp, NTT Basic Res Lab, Atsugi, Kanagawa 2430198, Japan
来源：
APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 22期
关键词：
D O I：
10.1063/1.2398931
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The dynamics of the laser ablation plume expansion of aluminum was investigated by using space- and time-resolved soft x-ray absorption spectroscopy. Blueshifts of the Al L-shell photoabsorption edge indicating the state of aluminum were observed in the plumes, which were generated by irradiating an aluminum target with 120 fs near-infrared pulses at an intensity of 10(14) W/cm(2). The spatiotemporal evolution of the plumes exhibited a multilayer structure consisting of vaporized aluminum and condensed aluminum particles, following the expansion of plasma, with expansion velocities of 10(4) m/s for the atomic state and 10(3) m/s for the condensed state. (c) 2006 American Institute of Physics.
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