A posteriori error indicators for Maxwellʹs equations

In this paper we shall analyze a class of a posteriori error indicators for an electromagnetic scattering problem for Maxwellʹs equations in the presence of a bounded, inhomogeneous and anisotropic scatterer. Problems of this type arise when computing the interaction of electromagnetic radiation with biological tissue. We briefly recall existence and uniqueness theory associated with this problem. Then we show how a posteriori error indicators can be derived using an adjoint equation approach. The error indicators use both the jump in normal and tangential components of the field across faces in the mesh.