Progress in rigorous and extremely fast electromagnetic methods for diffraction computations

摘要

There is a growing demand for and a lack of ultrafast, memory sparing but rigorous light scattering calculation techniques for large planar 2D diffracting objects. A good approach to these requirements is the Generalized Source Method (GSM) formulated in Fourier space [1] and its ongoing improvement. In this contribution, we report on recent improvements achieved by switching from CPU to GPU computations, application of the scattering-vector (S-vector) algorithm [2, 3] and extrapolation techniques [6]. 138-139 Volumetric diffractive optical elements in non-oxide photosensitive chalcogenide glass-based layers A. Joerg$1J. Lumeau$1; $1Aix-Marseille Universite, CNRS, Centrale Marseille, Institut Fresnel, UMR 7249,13013 Marseille - France; ;; This paper describes the fabrication of volumetric diffractive optical elements (DOEs) based on chalcogenide glass. Phase change is not obtained by a local change of the thickness of the layers but by a local refractive index change using the photosensitivity of the glasses. High quality binary and multilevel DOEs are demonstrated.