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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 22 — Oct. 22, 2012
  • pp: 24864–24872

Time-resolved studies of femtosecond-laser induced melt dynamics

Claudia Unger, Jrgen Koch, Ludger Overmeyer, and Boris N. Chichkov  »View Author Affiliations

Optics Express, Vol. 20, Issue 22, pp. 24864-24872 (2012)

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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 μm and 8 μm (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.

© 2012 OSA

OCIS Codes
(110.0180) Imaging systems : Microscopy
(140.3390) Lasers and laser optics : Laser materials processing
(140.7090) Lasers and laser optics : Ultrafast lasers
(160.3900) Materials : Metals
(310.0310) Thin films : Thin films
(100.0118) Image processing : Imaging ultrafast phenomena

ToC Category:
Laser Microfabrication

Original Manuscript: August 21, 2012
Revised Manuscript: September 21, 2012
Manuscript Accepted: September 22, 2012
Published: October 16, 2012

Claudia Unger, Jrgen Koch, Ludger Overmeyer, and Boris N. Chichkov, "Time-resolved studies of femtosecond-laser induced melt dynamics," Opt. Express 20, 24864-24872 (2012)

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