Design of ZnO multilayers with different porosities for UV absorbing transparent glasses

We present ZnO multilayers with different porosities on glass substrate for high efficient UV absorbing transparent glasses. Diffraction efficiencies of the proposed ZnO multilayers were calculated using a rigorous coupled wave analysis method. The results show the effect of design parameters such as effective index, porosity and thickness on the optical characteristics. The analysis based on volume averaging theory also supports the calculation results. Detailed design guidelines for optimum geometry are also discussed.