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Time-resolved thermoreflectivity of thin gold films and its dependence on film thickness
被引：0
|作者：
J. Hohlfeld
J.G. Müller
S.-S. Wellershoff
E. Matthias
机构：
[1] Fachbereich Physik,
[2] Freie Universit\"at Berlin,undefined
[3] Arnimallee 14,undefined
[4] 14195 Berlin,undefined
[5] Germany FAX +49-30/838-6059,undefined
来源：
Applied Physics B
|
1997年
/
64卷
关键词：
PACS: 73.50.-h; 78.47.+p;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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\valunit{500}{nm}\end{document} have been measured by femtosecond time-resolved pump-probe experiments. A conspicuous change of the relaxation behavior was found around \documentclass[12pt]{minimal}
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\valunit{100}{nm}\end{document} for pump pulse fluences of \documentclass[12pt]{minimal}
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\valunit{1}{mJ/cm^{2}}\end{document}. Thicker films show a nearly exponential decay of the transient linear reflectivity, which turns into a linear decay during the first \documentclass[12pt]{minimal}
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\rangeunit{5}{7}{ps}\end{document} for films with thicknesses of \documentclass[12pt]{minimal}
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\valunit{100}{nm}\end{document} or less. This observation is evidence of a mean free path of about \documentclass[12pt]{minimal}
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\valunit{100}{nm}\end{document} for hot electrons with temperatures around \documentclass[12pt]{minimal}
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\valunit{1500}{K}\end{document}.
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页码：387 / 390
页数：3
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