Optical effects by opal/reverse opal structures, laser polymerizing and plasmonic Ag ultra-thin films

Abstract

The optical effects were obtained by three different ways, which are opal structures, laser polymerizing and plasmonic ultrathin Ag films deposition. Opal structures were realized by deposition of a thin layer composed of sub-micron spheres of polystyrene on the surface of an optical fiber using drop-drying method and capillary method. Multiple diffraction gratings have been designed and obtained on mechanically processed optical fiber, through means of Two-Photon Polymerization via laser direct writing (3D Lithography - 3DL). Ultrathin Ag films of 1 to 9 nm thickness were deposited by RF Magnetron Sputtering onto different substrates.