Behavior of Ag and ZnO thin films, deposited by thermal evaporation technique, as an optical filter

Interference filters are multilayer thin-film devices in which thin :layers of material have a thickness of the order of wavelength of light. Thin films of dielectrics as well as metals have been nice candidates for the purpose of interference filters for a long time. In the present paper thin films of silver and zinc oxide have been deposited by thermal evaporation technique on the glass substrate. The optical transmittance of these films as well as combinations of these films has been investigated thoroughly in the visible and near infrared region.