Document Details

Document Type : Article In Journal 
Document Title :
Annealing and laser irradiation effects on optical constants of Ga 15Se85 and Ga15Se83In2 chalcogenide thin films
Annealing and laser irradiation effects on optical constants of Ga 15Se85 and Ga15Se83In2 chalcogenide thin films
 
Subject : Physics 
Document Language : English 
Abstract : Chalcogenide thin films finds extensive applications in optical imaging, optical recording, integrated optics, optical communications and microelectronics. Optical constants (absorption coefficient, refractive index and extinction coefficient) of amorphous, thermally annealed and laser irradiated Ga15Se85 and Ga15Se 83In2 thin films deposited by thermal evaporation onto chemically cleaned glass substrate, were calculated from absorbance and reflectance spectra as a function of photon energy in the wavelength region 400-900 nm. Analysis of the optical absorption data shows that the rule of non-direct transitions predominates. It has been found that the absorption coefficient increasing with increasing the exposure time of laser irradiation and also by increasing photon energy. The optical band gap decreases with increasing annealing temperatures. The refractive index (n) decreases, while the extinction coefficient (k) increases with increasing annealing temperature. The laser irradiated thin films showed a decrease in optical band gap and absorption coefficient with increasing exposure time of laser irradiation. The values of refractive index (n) increases and extinction coefficient (k) decreases with increasing exposure time of laser irradiation. The results have been analyzed on the bases of thermal annealing and laser irradiation effects in the chalcogenide thin films. 
ISSN : 1567-1739 
Journal Name : Current Applied Physics 
Volume : 11 
Issue Number : 3 
Publishing Year : 1432 AH
2011 AD 
Article Type : Article 
Added Date : Monday, February 6, 2012 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
أحمد عبدالله الغامديAl-Ghamdi, Ahmad AResearcherDoctorateAGAMDI@kau.edu.sa
شمشاد أحمد خانKhan, Shamshad AhmedResearcherDoctorateshamshad_phys@yahoo.com
صالح هديهد الحنيطيAl-Heniti, Saleh HResearcherDoctoratesalheniti@kau.edu.sa
فيصل عبدالعزيز العقلAl-Agel, Faisal AResearcherDoctoratefagel@kau.edu.sa
Mohd ZulfequarZulfequar, Mohd ResearcherDoctorate 

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