Wave splitting of Maxwell's equations with anisotropic heterogeneous constitutive relations

Details Wave splitting of Maxwell's equations with anisotropic heterogeneous constitutive relations Wave splitting of Maxwell's equations with anisotropic heterogeneous constitutive relations

2008-09-04

arxiv.org/abs/0809.0789v1

Inverse Problems and Imaging 3(2), pp 405-452, 2009.

Physics

Mathematical Physics

45 pages, 2 figures

Scientific paper

10.3934/ipi.2009.3.405

The equations for the electromagnetic field in an anisotropic media are written in a form containing only the transverse field components relative to a half plane boundary. The operator corresponding to this formulation is the electromagnetic system's matrix. A constructive proof of the existence of directional wave-field decomposition with respect to the normal of the boundary is presented. In the process of defining the wave-field decomposition (wave-splitting), the resolvent set of the time-Laplace representation of the system's matrix is analyzed. This set is shown to contain a strip around the imaginary axis. We construct a splitting matrix as a Dunford-Taylor type integral over the resolvent of the unbounded operator defined by the electromagnetic system's matrix. The splitting matrix commutes with the system's matrix and the decomposition is obtained via a generalized eigenvalue-eigenvector procedure. The decomposition is expressed in terms of components of the splitting matrix. The constructive solution to the question on the existence of a decomposition also generates an impedance mapping solution to an algebraic Riccati operator equation. This solution is the electromagnetic generalization in an anisotropic media of a Dirichlet-to-Neumann map.

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