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Proceedings Paper

Behavior of thin metallic films melted with a nanosecond laser pulse
Author(s): J. Bischof; M. Reinmuth; Johannes Boneberg; Stephan Herminghaus; T. Palberg; Paul Leiderer
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Paper Abstract

Thin metal films (Cu, Au, Ni) and thin Si films with different thicknesses on fused silica were irradiated with a ns-pulse from a Nd:YAG-laser (lambda equals 532 nm, FWHM 7 ns). In this paper we want to focus on the optical properties of an undercooled metallic liquid and the observed dewetting of the thin films. The ongoing processes were monitored in situ with ns- time-resolved reflectivity measurements. We determined the thresholds for partial and compete melting of these films. Due to the high cooling rates (up to 1011 K/s) different 'frozen' stages of the dewetting phenomenon can be studied in detail with ex situ microscopic investigations, e.g. optical microscopy and scanning near field acoustic microscopy. We present measurements which show that we have observed spinodal dewetting of these thin films.

Paper Details

Date Published: 11 March 1996
PDF: 9 pages
Proc. SPIE 2777, ALT'95 International Symposium on Advanced Materials for Optics and Optoelectronics, (11 March 1996); doi: 10.1117/12.232207
Show Author Affiliations
J. Bischof, Univ. Konstanz (Germany)
M. Reinmuth, Univ. Konstanz (Germany)
Johannes Boneberg, Univ. Konstanz (Switzerland)
Stephan Herminghaus, Univ. Konstanz (Germany)
T. Palberg, Univ. Konstanz (Germany)
Paul Leiderer, Univ. Konstanz (Germany)


Published in SPIE Proceedings Vol. 2777:
ALT'95 International Symposium on Advanced Materials for Optics and Optoelectronics

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