Adaptive perfectly matched layer for Wood%26apos;s anomalies in diffraction gratings

作者：Vial Benjamin^*; Zolla Frederic; Nicolet Andre; Commandre Mireille; Tisserand Stephane

来源：Optics Express, 2012, 20(27): 28094-28105.

DOI：10.1364/OE.20.028094

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%26apos;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.

• 出版日期2012-12-17