title: Fast analysis method for polarization-dependent performance of a concave diffraction grating with total-internal-reflection facets.
abstract: A fast simulation method for a waveguide-based concave grating with total-internal-reflection (TIR) facets is presented using the Kirchhoff-Huygens principle. Unlike the conventional scalar method, modifications are made to take into account the influence of the Goos-Hänchen (GH) shift. The simple method is in good agreement with a numerical method based on rigorous coupled-wave analysis for a wide range of practical device parameters and can provide an insightful physical explanation for the numerical results. It is shown that the GH shift is a main contributing factor for the loss and the polarization-dependent loss of an etched diffraction grating demultiplexer with TIR facets.
authors.affiliation: Centre for Optical and Electromagnetic Research, Joint Research Center of Photonics of the Royal Institute of Technology, Sweden.
authors.forename: Jun
authors.initials: J
authors.lastname: Song
authors.forename: Jian-Jun
authors.initials: JJ
authors.lastname: He
authors.forename: Sailing
authors.initials: S
authors.lastname: He