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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：Professor Dr. Hongbin Ding
其他任职：物理学院学术委员会主任，等离子体联合研究中心主任,中国光学工程学会LIBS专委会副主任, 中国核学会核聚变等离子体分会常务理事，辽宁省物理学会副理事长，国际ITER-ITPA 委员
性别：男
毕业院校：巴塞尔大学
学位：博士
所在单位：物理学院
学科：等离子体物理. 光学工程
联系方式：hding@dlut.edu.cn
电子邮箱：hding@dlut.edu.cn
Dynamics of ultrafast laser plasma expansion in the presence of an ambient
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论文类型：期刊论文
发表时间：2013-11-04
发表刊物：APPLIED PHYSICS LETTERS
收录刊物：SCIE、EI、Scopus
卷号：103
期号：19
ISSN号：0003-6951
摘要：We investigated the role of ambient gas pressure on the expansion and the emission features during ultrafast laser ablation of metal target. Plasma plumes were generated using 800 nm, 40 fs laser pulses on a copper target and the ambient air pressure was varied more than seven orders (1 x 10(-5) -760 Torr) of magnitude. Fast-gated images showed a complex interaction between the plume and ambient leading to changes in the plume geometry with pressure as well as time. The ambient pressure levels are found to affect both the line intensities and broadening along with signal to noise (S/N) and signal to background (S/B) ratios. The optimum pressure condition for analytical applications is found to be similar to 100 Torr. (c) 2013 AIP Publishing LLC.