title: Perfectly matched layers as nonlinear coordinate transforms: a generalized formalization.
abstract: A modified formulation of Maxwell's equations is presented that includes a complex and nonlinear coordinate transform along one or two Cartesian coordinates. The added degrees of freedom in the modified Maxwell's equations allow one to map an infinite space to a finite space and to specify graded perfectly matched absorbing boundaries that allow the outgoing wave condition to be satisfied. The approach is validated by numerical results obtained by using Fourier-modal methods and shows enhanced convergence rate and accuracy.
authors.affiliation: Laboratoire Charles Fabry de l'Institut d'Optique, Centre National de la Recherche Scientifique, F-91403 Orsay cedex, France. Jean-Paul.Hugonin@iota.u-psud.fr
authors.forename: Jean Paul
authors.initials: JP
authors.lastname: Hugonin
authors.forename: Philippe
authors.initials: P
authors.lastname: Lalanne