Spectral dependences of the principal angle of incidence and quasi polarizing angle of metals

Abstract

Principal angle of incidence and quasi-polarizing angle methods are performed to determine the spectral dependences of the principal angle of incidence and quasi-polarizing angle of copper polycrystalline metal at range of wavelengths from 500 nm - 650 nm. Using the principal angle of incidence method, the spectral dependences of the optical constants of copper sample are determined. In case of the quasi-polarizing angle method, the intensity of the reflection of p- polarized component is measured at different angles of incidence for each wavelength. The angle of incidence at which the intensity has minimum value is referred to the quasi polarizing angle for this wavelength. The results show that the quasi polarizing angle is found to be close to the value of the principal angle of incidence for the copper sample at each wavelength.