Linear and non-linear optical properties of amorphous Se and M5Se95 (M = Ge, Ga and Zn) films

The variations in structure and optical properties of amorphous a-Se and a-M 5 Se 9 5 (M = Ge, Ga and Zn) films have been studied based on FTIR and optical measurements. FTIR transmittance spectra for a-Se and a-M 5 Se 9 5 (M = Ge, Ga and Zn) glasses were measured as a function of wavenumber. The ad...

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Bibliographic Details
Published inBulletin of materials science Vol. 39; no. 7; pp. 1819 - 1825
Main Authors ABBADY, GH, ALY, K A, SADDEEK, Y, AFIFIY, N
Format Journal Article
LanguageEnglish
Published Bangalore, India Indian Academy of Sciences 01.12.2016
Springer Nature B.V
Subjects
Chemical bonds
Chemistry and Materials Science
Energy
Engineering
Germanium
Glass substrates
Materials Science
Optical measurement
Optical properties
Physical properties
Refraction
Refractivity
Selenium
Spectrum analysis
Wavelengths
Thin films
optical properties
vapour deposition
infrared spectroscopy
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Summary:The variations in structure and optical properties of amorphous a-Se and a-M 5 Se 9 5 (M = Ge, Ga and Zn) films have been studied based on FTIR and optical measurements. FTIR transmittance spectra for a-Se and a-M 5 Se 9 5 (M = Ge, Ga and Zn) glasses were measured as a function of wavenumber. The addition of Ge, Ga and Zn increases the vibrational frequency of the a-Se main band. The absorption edge of Ge 5 Se 9 5 shifted towards long side of the wavelength in comparison with that of a-Se film. This shift increases gradually in the case of Ga 5 Se 9 5 and Zn 5 Se 9 5 films. So, the optical bandgap of M 5 Se 9 5 films was decreased, but the index of refraction was increased. The first and third order of electric susceptibility ( χ (1) and χ (3) ) and non-linear index of refraction ( n 2 ) were increased by adding Ge, Ga and Zn into a-Se.
ISSN:0250-4707
0973-7669
DOI:10.1007/s12034-016-1328-2