Thin films were deposited at an oblique angle of incidence by electron-beam evaporation as well as reactive and non-reactive sputtering. We have produced evaporated Cr films and sputtered metallic and partially oxidized films of Al, Cr and Ti. The optical transmittance of the films was measured as a function of the angle of incidence, and pronounced angular selectivity was found in many cases. The evaporated films show the highest angular selectivity in the luminous transmittance, but also some of the sputtered ones display promising optical properties. The optical properties of the sputtered films could be modeled with effective medium theories.
展开▼
