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Optical Constants of Polycrystalline 3d Transition Metal Oxides in the Wavelength Region 350 to 1200 nm

The refractive index and the extinction coefficient of polycrystalline oxides of Ti, V, Mn, Fe, Co, Cu, and Zn are determined from the measurement of the ratio of the reflection coefficients for incident light polarized parallel and perpendicular to the plane of incidence. The absorption coefficient and the reflectivity for light of normal incidence are calculated from the data. Among these oxides, CuO has a large extinction coefficient and a rather small refractive index, and hence a large absorption coefficient and a medium reflectivity, over the solar spectrum.