Study on some linear and nonlinear optical parameters of glycine hydrofluoride single crystals

• Autorzy: Abu El-Fadl A. , Abdel-Salam A. M. , Nashaat A. M.

Identyfikatory

DOI

10.2478/msp-2018-0096

• Języki publikacji: EN

Abstrakty

EN

Single crystal of glycine hydroflruoride (GHF) was grown from aqueous solution by slow evaporation technique. The structure of the grown crystal was tested and analyzed through X-ray powder diffraction. The functional groups have been identified from the FT-IR spectra. Slabs cut normal to the b-axis from the grown crystal were subjected to incident radiation with a wavelength range of 200 nm to 800 nm to investigate the transmittance and reflectance spectra. Linear optical parameters such as extinction coefficient k, refractive index n and both the real and imaginary parts: ∊_real and ∊_im of the dielectric permittivity were calculated as functions of the incident photon energy. The dispersion of the refractive index was fitted in terms of Cauchy formula and Wemple-DiDomenico single oscillator model. GHF crystals exhibited indirect optical interband transition and the optical energy gap E_g was determined by using Tauc plot. The indirect band gaps at elevated temperatures were determined and their temperature dependence was estimated. Optical band gap E_g values were found to decrease with an increase in crystal temperature; however, the band tail width exhibited opposite behavior. The nonlinear optical potential was examined by the second harmonic generation (SHG) test.

Słowa kluczowe

EN

GHF single crystal; optical energy gap; optical constants; temperature dependence; SHG efficiency

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2018
• Tom: Vol. 36, No. 4
• Strony: 685--696
• Opis fizyczny: Bibliogr. 26 poz., rys., tab.

Twórcy

autor

Abu El-Fadl A.

• Faculty of Science, Department of Physics, Assiut University, Assiut 71516, Egypt

autor

Abdel-Salam A. M.

• Faculty of Science, Department of Physics, Assiut University, Assiut 71516, Egypt

autor

Nashaat A. M.

• Faculty of Science, Department of Physics, Assiut University, Assiut 71516, Egypt

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).