Interface response and rescaling approach to the eigenvectors of layered composite systems. II. Triple-layer slab

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Abstract
We consider the eigenproblem of a composite system of three different layer subsystems, assumed to be coupled at their interfaces. General formulas for the eigenvectors and eigenvalues (characteristic equation) of the total system, as well as its interface response-rescaling parameters, are derived and expressed in terms of matrix elements of the individual subsystem response functions and the interface coupling parameters.