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Effective dielectric function of mixtures of three or more materials: a numerical procedure for computations

: Bosch, S.; Ferre-Borrull, J.; Leinfellner, N.; Canillas, A.


Surface Science 453 (2000), Nr.1, S.9-17
ISSN: 0039-6028
Fraunhofer IOF ()

A numerical procedure for solving the mathematical equations that define the effective medium for a mixture of materials is presented. The basic idea is to transform the inherent complex root-finding problem into a minimization task in real space so that the method can be implemented through a standard two-dimensional minimization algorithm. This leads to general, simple and useful procedures for ellipsometric and/or spectrophotometric data analysis in the optical characterization of materials and surfaces.