Angular filtering by Bragg photonic microstructures fabricated by physical vapour deposition

• DOI: 10.1016/j.apsusc.2019.03.082
• Publication Date: 2019-03-12T02:57:09Z
• Authors: Lina Grineviciute; Ceren Babayigit; Darius Gailevičius; Emre Bor; Mirbek Turduev; Vytautas Purlys; Tomas Tolenis; Hamza Kurt; Kestutis Staliunas
• Keywords: Xarxes de; surface grating; FDTD; Materials Science; 01 natural sciences; Equacions de Maxwell; Photonic crystals; Physical vapour deposition; Beamforming; 0103 physical sciences; physical vapour deposition; Spatial filtering; :Física [Àrees temàtiques de la UPC]; Physics; Àrees temàtiques de la UPC::Física; Glancing angle deposition; Bragg gratings; Bragg; Bragg, Xarxes de; Chemistry; Maxwell equations; Surface grating; photonic crystals; Axisymmetric photonic; glancing angle deposition; Cristalls fotònics

We propose and experimentally demonstrate spatial filtering by photonic crystals in a Bragg configuration. Compared to the Laue configuration, where spatial filtering was already demonstrated before, the Bragg configuration is more technologically challenging, as the longitudinal periods of such structures must be shorter than the operational wavelength. The proposed configuration is designed and analyzed by FDTD simulations and the multilayer structure is fabricated by physical vapour deposition on the microstructured substrate. The measurements of the angle/wavelength transmission of the fabricated structure show the signatures of the angular filtering.<br/>Peer Reviewed<br/>