Quartic perfectly matched layers for dielectric waveguides and gratings

Abstract

Abstract In some cases, perfectly matched layers (PML) with quartic conductor profiles are superior to the traditional quadratic gradations. This PML boundary condition can be applied to gratings; it does not suffer from Fabry‐Perot fringes and is not swamped by noise, unlike the absorbing boundary condition. © 1995 John Wiley & Sons, Inc.