The TMM al-lows analyzing different thin film designs such as single films(5,6),Braggmirrors—crystals—,quasycristals—e.g. The method uses the transfer matrix and is commonly known as the transfer matrix method [7,29]. This document describes, briefly, how to use the Matlab script, TransferMatrix.m to calculate optical interference and absorption in multilayer stacks. Abstract. The transfer matrix method —TMM— reviewed here aims to help predicting the behavior of multilayer thin films structures in a