Transformation optics PML and quasi-mode analysis: Application to diffraction gratings Available to Purchase

This paper presents the Perfectly Matched Layers (PMLs) in the framework of transformation optics as a complexvalued change of coordinates. PMLs provide the suitable operator extensions required for the leaky mode computation of open waveguides and the quasi-mode computation of scattering problems. Quasi-modes of diffraction gratings are considered here together with a numerical use of this spectral analysis.