Time-resolved studies of femtosecond-laser induced melt dynamics

被引：105

作者：

Unger, Claudia ^{[1
]}

Koch, Jrgen ^{[1
]}

Overmeyer, Ludger ^{[1
]}

Chichkov, Boris N. ^{[1
]}

机构：

[1] Laser Zentrum Hannover eV, D-30419 Hannover, Germany

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 22期

关键词：

GOLD-FILMS; EJECTION; FLUENCE;

D O I：

10.1364/OE.20.024864

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This work presents time-resolved images of femtosecond-laser-induced melt dynamics in 60 nm gold films on glass substrates. Melt dynamics induced by laser radiation with focus diameters of 6 mu m and 8 mu m (FWHM) at constant laser fluence is investigated with a temporal resolution of 10 ns. In both cases, the formation of the microbumps and gold jets takes at least 250 ns. It is shown that the formation process can be compared to jetting behavior induced by cavitation bubbles near a free liquid surface. This is confirmed by SEM illustrating a re-entrant spike through a hole in the microbump. (C) 2012 Optical Society of America

引用

页码：24864 / 24872

页数：9

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