Linear and non-linear optical properties of amorphous Se and M5Se95 (M = Ge, Ga and Zn) films
Source abstract
Abstract
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.
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Research context
OpenAlex topics: Phase-change materials and chalcogenides · Chalcogenide Semiconductor Thin Films · Glass properties and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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