Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8162874 | Physica B: Condensed Matter | 2014 | 6 Pages |
Abstract
Chalcogenide thin film glasses with compositions of Ge30âxSe70Cdx, where x=0 and 16, were prepared and studied in terms of their structures and optical properties. The short range order proposed was obtained by interpretation of the radial distribution function, deduced from the experimental data of X-ray diffraction. The interatomic distances results for the first and second neighbors (2-5Â Ã
) indicate that the structure changes drastically after Cd additive. The optical parameters and the thickness were determined from the extremes of the interference fringes of transmission spectra at normal incidence in the wavelength range of 200-2500Â nm using the envelope method. The calculated values of the refractive index were fitted using the two-term Cauchy relation. The dispersion of the refractive index is discussed in terms of the single-oscillator Wemple and DiDomenico model. The optical band gap was carried from the absorption coefficient values using Tauc's procedure and the estimated values were 2.05 and 1.86Â eV for x=0 and 16, respectively.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
M.R. Balboul,