INTERFERENCE-INDUCED EFFECTS IN RAMAN STUDIES OF HYDROGEN-FREE DIAMOND-LIKE CARBON-FILMS

Citation
Ly. Khriachtchev et al., INTERFERENCE-INDUCED EFFECTS IN RAMAN STUDIES OF HYDROGEN-FREE DIAMOND-LIKE CARBON-FILMS, DIAMOND AND RELATED MATERIALS, 7(10), 1998, pp. 1451-1458
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science
ISSN journal
0925-9635
Volume
7
Issue
10
Year of publication
1998
Pages
1451 - 1458
Database
ISI
SICI code
0925-9635(1998)7:10<1451:IEIRSO>2.0.ZU;2-X
Abstract
In transparent hydrogen-free diamond-like carbon films, two types of i nterference-induced effects on Raman spectra are observed, amplitude e nhancement and spectral modification. Specific features of the interfe rence effects on Raman intensity components detected from different co nstituents of the samples, which are the film surface, diamond-like bu lk, and silicon substrate, are considered. The proportion between thes e Raman components is shown to be an oscillating function of the film thickness. A procedure to record selectively Raman scattering from bul k structure is proposed, and a discrimination factor of approx. 10(-2) for the surface scattering is experimentally demonstrated. The thickn ess dependency of the Raman intensity allows the absorption coefficien t of the bulk material to be estimated. The observed modification of t he Raman spectra influences the characterization of film microstructur e. (C) 1998 Elsevier Science S.A. All rights reserved.