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Proceedings Paper

Characterization of plumes produced during ultrashort laser ablation of metals and semiconductors
Author(s): Salvatore Amoruso; Marco Vitiello
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Paper Abstract

The characterization of a plasma plume is a key issue in laser ablation and deposition studies. Combined diagnostic measurements by Optical Emission Spectroscopy (OES), ion time-of-flight (TOF) and Atomic Force Microscopy (AFM) have been used to study the dynamics and composition of laser ablation plume produced during ultrashort laser irradiation of metals and semiconductors, in vacuum. Our results show that, in the laser intensity range of 1012-1013 W/cm2, the process of matter removal results in a plasma plume which is mainly composed of two different populations: atoms and nanoparticles. The nanoparticles dynamics during expansion has been analyzed through their structureless continuum optical emission, while atomic species have been identified by their characterstic emission lines. Atomic force microscopy analysis of the material deposited at room temperature has allowed the characterization of the nanparticles size distribution. In the case of silicon, the presence of a fast ion component emitted non-thermally from the sample surface as a result of the supercritical state induced by the intense ultrashort laser pulse irradiation has been also observed.

Paper Details

Date Published: 22 April 2005
PDF: 10 pages
Proc. SPIE 5830, 13th International School on Quantum Electronics: Laser Physics and Applications, (22 April 2005); doi: 10.1117/12.617174
Show Author Affiliations
Salvatore Amoruso, Coherentia-INFM (Italy)
Univ. degli Studi di Napoli Federico II (Italy)
Marco Vitiello, Coherentia-INFM (Italy)
Univ. degli Studi di Napoli Federico II (Italy)

Published in SPIE Proceedings Vol. 5830:
13th International School on Quantum Electronics: Laser Physics and Applications
Peter A. Atanasov; Sanka V. Gateva; Lachezar A. Avramov; Alexander A. Serafetinides, Editor(s)

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