Serebryannikov, Andriy E.Andriy E.SerebryannikovLalanne, PhilippePhilippeLalannePetrov, Alexander Yu.Alexander Yu.PetrovÖzbay, EkmelEkmelÖzbay2021-07-152021-07-152014Optics Letters 39 (21): 6193-6196 (2014)http://hdl.handle.net/11420/9894New 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°.en1539-479420142161936196OSA, The Optical SocietyPhysikJournal Article10.1364/OL.39.006193Journal Article