Optical Properties of Glasses

Edgar, A.

doi:10.1002/9781119506003.ch4

Cited by 2 publications

(1 citation statement)

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“…Where Eo is the single oscillator energy and Ed is the dispersion energy. As Seen in figure (1) the obtained data in the wavelength rang 900 nm:1000 nm below the band edge gives a straight line from the slope and the intersection of the linear regression line the single which is week compared with covalent and/or ionic bonds and hence the oscillator energy strength and the dispersion energy is lower than that of ionic or covalent bounded compositions Also the dangling bond which exists in this composition plays important rule in controlling the optoelectronic properties of this composition [34][35][36][37][38][39][40]. The bond type and the exitonic states also, effect on the properties of dispersion and single oscillator energies.…”

Section: Applicationmentioning

confidence: 96%

Application the reduced method for Characterization the photonic properties of amorphous Se 79.13 S 11.41 Te 9.64 Nano thin film composition Part(I)

Elsayed,

Khalifa

2023

Preprint

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Application the reduced method for determination the optical properties of nano thin film chalcogenide composition Se79.13S11.41Te9.64 reveals that the refractive index (n) is wavelength (λ) dependent. Cauchy dispersion equation is fit the obtained results of n = f (λ) for the measured wavelength and Cauchy dispersion coefficients are determined. The optical band edge is equal to 1.8eV. The optical energy gap is allowed indirect equals to 4 eV, The sup energy level in the gap equals to ≈ 3eV. From the dependence of extinction coefficient on λ the Fermi level of the nano thin film Se79.13S11.41Te9.64 is determined equals to 2.528 eV. Applying Wemple- DiDomenico The single oscillator model, the effective dispersion oscillator energy E o = 1.17 eV and the dispersion energy Ed is determined equal to ≈3.87 eV. Also, the following results determined, the static refractive index no =2.15, the static dielectric constant εo = 4.62 and the average bond strength is \({E}_{g}^{WD}=1.95eV\) The effect of lone pair concentration in chalcogenides on the energy gap and nonlinearity properties of amorphous chalcogenides is the subject of the second part of this work.

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