title: Adaptive Perfectly Matched Layer for Wood's anomalies in diffraction gratings.
abstract: We propose an Adaptive Perfectly Matched Layer (APML) to be used in diffraction grating modeling. With a properly tailored co-ordinate stretching depending both on the incident field and on grating parameters, the APML may efficiently absorb diffracted orders near grazing angles (the so-called Wood's anomalies). The new design is implemented in a finite element method (FEM) scheme and applied on a numerical example of a dielectric slit grating. Its performances are compared with classical PML with constant stretching coefficient.
authors.affiliation: Institut Fresnel, Domaine universitaire de Saint J´erˆome, 13397 Marseille cedex 20, France. benjamin.vial@fresnel.fr
authors.forename: Benjamin
authors.initials: B
authors.lastname: Vial
authors.forename: Frédéric
authors.initials: F
authors.lastname: Zolla
authors.forename: André
authors.initials: A
authors.lastname: Nicolet
authors.forename: Mireille
authors.initials: M
authors.lastname: Commandré
authors.forename: Stéphane
authors.initials: S
authors.lastname: Tisserand
mesh_terms: D016477:Artifacts; D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation