Two‐step effective medium theory and its application in predicting the optical properties of anodized alumina film

Abstract

SUMMARYWe propose a two-step effective medium theory to predict the optical properties of anodized alumina films based on the assumption that spherical aluminum particles are distributed in columnar structures within an anodized alumina film (distributed metallic column model). Using this model, theoretical parameters such as the volume ratio and distribution range of alumina particles were determined by fitting the experimental values and their dependencies on the anodization condition were evaluated. Using the above results, the optical constants of the alumina films were calculated. © 1998 Scripta Technica, Electron Comm Jpn Pt 2, 81(3): 2328, 1998