Ultrananocrystalline diamond;
Microwave plasma enhanced CVD;
Spectroscopic ellipsometry;
Ion beam analysis;
Atomic force microscopy;
X-ray diffraction;
CHEMICAL-VAPOR-DEPOSITION;
TIME SPECTROSCOPIC ELLIPSOMETRY;
OPTICAL-PROPERTIES;
THIN-FILMS;
GROWTH;
TEMPERATURE;
NUCLEATION;
MICROSCOPY;
GERMANIUM;
CONSTANTS;
D O I:
10.1016/j.tsf.2010.12.061
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
Optical properties of nanocrystalline and ultrananocrystalline diamond films were studied by ex situ variable angle spectroscopic ellipsometry. The films were prepared by Microwave Plasma Enhanced Chemical Vapor Deposition method. In the experiments Ar, CH4, and H-2 gases were used as source gases. Elastic recoil detection analysis was applied to measure the hydrogen content of the deposited layers. Three-layer optical models were constructed for the evaluation of the measured ellipsometric spectra. Besides the Cauchy relation, the effective medium approximation and the Tauc-Lorentz dispersion relation were also used for the modeling of the optical properties of the diamond films. Atomic force microscopy was applied to investigate the surface roughness in function of the deposition conditions. (C) 2010 Elsevier B.V. All rights reserved.