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- W2029689797 abstract "Abstract The optical constants of thin amorphous films yield important information on their structure and are also necessary for many applications, e.g. the modelling of holographic grating characteristics. This paper presents measurements of the refractive index and absorption coefficient from the visible (0.5 μm) to the far-IR (10μm) for both as-deposited and annealed As40S60 and As30S70 evaporated films photodoped with Ag. The refractive index difference between the undoped and the most heavily doped as-deposited films is > 0.5 over this wavelength region and both doped and undoped films are weakly absorbing in the IR, which indicates that these materials are suitable for the fabrication of diffractive IR optical elements. The change in the optical gap of these AsS films as a function of Ag content has been monitored and compared with that for bulk AsSAg samples: the gap decreases from 2.5 to 1.7 eV as the Ag content is increased to 30 at. %., which can be attributed to the smaller binding energy of the AgS bonds that are formed compared with that for AsS bonds." @default.
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- W2029689797 date "1989-12-01" @default.
- W2029689797 modified "2023-09-26" @default.
- W2029689797 title "Optical constants of Ag-photodoped as-S amorphous films" @default.
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- W2029689797 doi "https://doi.org/10.1016/0022-3093(89)90084-7" @default.
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