Optical properties of amorphous diamond prepared by a mass-separated ion beam: Correlation with the Raman spectra

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.365830· OSTI ID:530046

Khriachtchev, L Y; Raesaenen, M ^[1]; Lappalainen, R ^[2]

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1. Laboratory of Physical Chemistry, University of Helsinki, P.O. Box 55, FIN-00014 Helsinki (Finland)
2. Department of Physics, University of Helsinki, P.O. Box 9, FIN-00014 Helsinki (Finland)

The optical properties of amorphous-diamond films prepared by a mass-separated ion beam are studied and compared with the shape of the corresponding Raman spectra. The Raman measurements with moderate spatial resolution indicate that the films possess the sp{sup 3} fraction distributed along the film surface, the thinner edges being less diamondlike than the thicker center. The optical parameters of the film material, such as the refractive index and absorption coefficient, follow the spatial changes of the sp{sup 3} fraction, and the amorphous-diamond center is characterized by a relatively high refractive index (n{approximately}2.50) and quite low absorption ({alpha}{approximately}0.2{times}10{sup 4}cm{sup {minus}1} at 633 nm). Numerical correlation between the Raman spectra and optical parameters proposes a common origin for their spatial distribution, namely, impurities perturbing the three-dimensional diamondlike network and causing sp{sup 2}-coordinated carbon areas. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 530046
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 1 Vol. 82; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
AMORPHOUS STATE
DIAMONDS
ENERGY BEAM DEPOSITION
ION BEAMS
OPTICAL PROPERTIES
RAMAN SPECTRA
REFRACTIVE INDEX
THIN FILMS