Impact of sulfur content on structural and optical properties of Ge20Se80−xSx chalcogenide glasses thin films

Dongol, M.; Elhady, A.F.; Ebied, M.S.; Abuelwafa, Amr Attia

doi:10.1016/j.optmat.2018.02.033

Cited by 40 publications

(4 citation statements)

References 48 publications

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“…It is clear that the values of both E d and E o take opposite behavior. The values of E 0 match well with the experimental values of E g which are calculated by Kubelka-Munk relation, E 0 can be calculated also by E 0 ≈ ∂E , g where ∂ is a constant of proportionality ≈2 as mentioned in the literature [48,49]. Furthermore, according to Wemple -Didomenico model, an approximate value of E g can be calculated by using oscillator energy E 0 ( ) as the following relation [50]:…”

Section: Optical Propertiessupporting

confidence: 82%

The Co-precipitated preparation, characterization, and optical investigations of Cu-doped CdO nanomaterials

Shalaby¹,

Elshahawy²,

Yousif³

et al. 2022

Phys. Scr.

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The doped-CdO nanostructures with transition metals attract considerable interest due to their chemical and physical properties. That differs from those bulk materials, especially the variation of their optical bandgap, which makes them used in various applications. This communication focuses on the synthesis, characteristic properties of un-doped/doped Cd1-x Cu x O nanocomposites produced by the co-precipitated technique. XRD patterns indicate the polycrystalline nature of the investigated samples whereas Cu atoms have been effectively diffused into the Cd sites. It is found that at lower concentrations of Cu (111) diffraction planes were mainly the preferential ones while at higher concentrations, the plane (200) appeared as a preferential one. The average particle size increases with the addition of Cu dopant. From TEM it is found that the average particle size ranges from ~ 18 to 89 nm. SEM photographs show a formation of distinguished agglomerates. Also, EDX shows that the common elements (Cd, Cu, and O) were obtained without any impurities. The thermal stability increases with increasing Cu concentrations. The optical band gap (E g) decreases and Urbach energy (E u) increases, respectively, with increasing the content of Cu. As a result, the CdO doped Cu can be used to develop novel photovoltaic and light-emitting instruments.

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Section: Optical Propertiessupporting

confidence: 82%

The Co-precipitated preparation, characterization, and optical investigations of Cu-doped CdO nanomaterials

Shalaby¹,

Elshahawy²,

Yousif³

et al. 2022

Phys. Scr.

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“…In this method, the sample thickness d can be regarded as either a measured value 16) or a fitting parameter. [15][16][17][18][19][20] To obtain the refractive index dispersion curve, the refractive indices calculated from Eq. ( 3) are fitted to the Sellmeier equation…”

Section: The Principles Of the Minimum Deviation And The Interferomet...mentioning

confidence: 99%

“…The interferometric method is widely used to determine the refractive index dispersions of glasses from transmission spectra with fringe patterns of thin samples. [15][16][17][18][19][20] This method requires a thin sample with parallel and flat surfaces and can be applied to determine the refractive index of chalcogenide glasses. Thin samples of chalcogenide glasses can be easily obtained by sputtering.…”

Section: Introductionmentioning

confidence: 99%

“…Thin samples of chalcogenide glasses can be easily obtained by sputtering. [18][19][20] However, it is desirable to evaluate the refractive index from samples of bulk glasses to design optical devices such as lenses and optical fibers. The refractive index dispersion of a bulk silica glass was determined by the method with the polished sample in the near-infrared region.…”

Section: Introductionmentioning

confidence: 99%

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A method of determining the refractive index of glasses in wide mid-infrared

Nakatani

Matsumoto

Sakai

et al. 2023

Jpn. J. Appl. Phys.

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We propose a method of merging the minimum deviation and the interferometric method to determine the refractive index dispersions of glasses in a wide range of the mid-infrared region with high accuracy. By the proposed method, the refractive index dispersions of telluride glasses, included in chalcogenide glasses, are successfully determined in the wavelength range from 3 to around 20 μm. The accuracy of the refractive index by the proposed method is no more than 1×10−3

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