Solution of the Equation for Wave Propagation in Layered Slabs with Complex Dielectric Constants

A numerical procedure for solving the eigenvalue equation u″ = [V(x) − E]u, where V(x) is complex, is described. The number of eigenvalues, and their approximate location, can be determined by contour integration in the complex trial eigenvalue plane. Some general features of the solutions, and an example, are given.