Browsing by Author "Alhussein, Ibraheem Suliman"
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Item Restricted Optical properties of InxGa1-xAs alloys investigated by ellipsometry(Saudi Digital Library, 2020) Alhussein, Ibraheem Suliman; Rebei, Hamad AlHadiExperimental measurements using spectroscopic ellipsometry were conducted on GaAs, InAs, and InGaAs compounds. The dielectric function spectra and critical point energies were determined in a spectral range of 0.68 to 3.35eV. Ellipsometry data were analysed and the pseudo dielectric function was extracted using an adequate model. The second energy derivative of the real and imaginary parts of the dielectric function was used to fit standard line shapes of the experimental data. The data displayed numerous spectral features associated with critical points (E0, E1, and E1+ 1) whose energies depended on the indium composition. The precision of measurement was proved by comparing the ellipsometric results to photoreflectance (PR) and photoluminescence (Pl) Outcomes.2 0