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Proceedings Paper

Optical properties of laser-modified diamond surface
Author(s): A. V. Khomich; V. V. Kononenko; Sergej M. Pimenov; Vitali I. Konov; S. Gloor; Willy A.R. Luethy; Heinz P. Weber
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Paper Abstract

The results of laser polishing of 350 micrometers thick free- standing diamond films are reported. The polishing was performed with a grazing beam of a copper vapor laser. It is shown that the laser polishing conditions and the resulting surface roughness are controlled by varying an angle of incidence of a scanning laser beam during polishing. The surface roughness of the as-grown films was reduced by an order of magnitude and a minimum roughness of Ra equals 0.38 micrometers was achieved as a result of the two-step polishing. Optical transmission in the UV-visible spectral range of the diamond films polished under the optimized conditions was found to be close to the optical transmission of the mechanically polished diamond film. Properties of the laser-graphitized layer at the diamond surface were studied with optical spectroscopy techniques in the process of oxidative removal of the layer with increasing temperature of the oxidation in ambient air. The optical properties and oxidation stability of the laser-modified surface layer were found to change throughout its thickness from the surface to the diamond interface, depending on the laser polishing regime.

Paper Details

Date Published: 20 October 1998
PDF: 9 pages
Proc. SPIE 3484, Lasers in Synthesis, Characterization, and Processing of Diamond, (20 October 1998); doi: 10.1117/12.328204
Show Author Affiliations
A. V. Khomich, Institute of Radio Engineering and Electronics (Russia)
V. V. Kononenko, General Physics Institute (Russia)
Sergej M. Pimenov, General Physics Institute (Russia)
Vitali I. Konov, General Physics Institute (Russia)
S. Gloor, Univ. of Bern (Switzerland)
Willy A.R. Luethy, Univ. of Bern (Switzerland)
Heinz P. Weber, Univ. of Bern (Switzerland)

Published in SPIE Proceedings Vol. 3484:
Lasers in Synthesis, Characterization, and Processing of Diamond
Vitali I. Konov; Victor G. Ralchenko, Editor(s)

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