الفهرس 
Title : Advanced measurements of the optical characteristics of polycrystalline metals using polarized light
AbstractOnly 14 pages are availabe for public view
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Abstract
The thesis deals with the optical characteristics of the metals zinc and cadmium using polarized light. The studied samples are polycrystalline sheets of purity 99.999%, thickness 0.05 mm and surface area 30 mm x 30 mm. Measurements were carried out using He-Ne stabilized intensity laser (n = 632.8 nm) at room temperature. The thesis includes four chapters: the first chapter deals with the polarized light and its characteristics. In chapter two, we discussed the optics of metals. Chapter three presents the experimental work, the used optical settings and the mathematical expressions used for extracting the results. Finally, in chapter four, the results of the experimental work are presented and discussed and the uncertainty of the measurements is evaluated. The following experiments were performed:etermination of the principal angle of incidence and the principal azimuthal angle for Zn and Cd at n = 632.8 nm and using the principal angle to calculate the refractive index and extinction coefficient for the two metals.Determination of the quasi-polarizing angle for Zn and Cd at n = 632.8 nm. II We constructed a manual ellipsometer to measure the optical constants (refractive index and extinction coefficient) of Zn and Cd at 632.8 nm and studied the effect of surface roughness on the values of the optical constants. We used diamond paste of different grain sizes to obtain five samples of different surface roughness. It was found that by increasing the roughness, the refractive index increases while the extinction coefficient decreases.Using the Spectroscopic ellipsometer PhE-103, Angstrom Advanced Inc., we measured the growth of naturally formed oxide layers on Zn and Cd with time at room conditions.The uncertainty for the experimental results was calculated