Document Details

Document Type : Article In Journal 
Document Title :
Compositional dependence of the optical constants of amorphous GexAs20Se80−x thin films
اعتماد الثوابت الضوئية على اختلاف التركيب للأغشية الأمورفية المحضرة من جرمانيوم-زرنيخ - سيلينيوم
 
Subject : Optical properties by using only transmittance 
Document Language : English 
Abstract : This paper reports the effect of replacement of selenium by germanium on the optical constants of chalcogenide GexAs20Se80−x (where x = 0, 5, 10, 15 and 20 at.%) thin films. Films of GexAs20Se80−x glasses were prepared by thermal evaporation of the bulk samples. The transmission spectra, T (λ), of the films at normal incidence were obtained in the spectral region from 400 to 2500 nm. A straightforward analysis proposed by Swanepoel, based on the use of the maxima and minima of the interference fringes, has been applied to derive the real and imaginary parts of the complex index of refraction and also the film thickness. Increasing germanium content is found to affect the refractive index and the extinction coefficient of the GexAs20Se80−x films. Optical absorption measurements show that the fundamental absorption edge is a function of composition. With increasing germanium content the refractive index decreases while the optical band gap increases. 
ISSN : 10-088-0022-372 
Journal Name : JOURNAL OF PHYSICS D: APPLIED PHYSICS 
Volume : 41 
Issue Number : 41 
Publishing Year : 1429 AH
2008 AD 
Article Type : Article 
Added Date : Wednesday, December 29, 2010 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
كمال عبدالنبي عليAli, Kmal AbdualnabiResearcherDoctorate 

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