Serebryannikov, A. E.Lalanne, P.Petrov, A. Y.Özbay, Ekmel2016-02-082016-02-0820140146-9592http://hdl.handle.net/11693/26582New diffractive optical elements offering a frequency tolerant, very efficient, high-pass and bandpass spatial filtering over a broad range of incidence angles are demonstrated by numerical simulations. The device operates in reflection mode owing to the (nearly) perfect blazing. It relies on two-dimensional square-lattice photonic crystals composed of dielectric rods with simple corrugations at the interface. Similar performance can be obtained with gratings composed of a single rod layer placed in the near field of a metal mirror, indicating a route to geometries that can be easily fabricated with modern nanotechnologies. Also equal splitting between zero and first negative orders can be obtained for incidence-angle variations that are wider than 60°. © 2014 Optical Society of AmericaEnglishBeamformingAngle variationDielectric rodsIncidence anglesMetal mirrorReflection modesSpatial filteringsSquare-latticeWide-angle reflectionPhotonic crystalsArticle10.1364/OL.39.006193