KEYWORDS: Finite-difference time-domain method, Silicon, Silver, Scanning electron microscopy, Near field scanning optical microscopy, Near field, Solids, Nanolithography, Near field optics, Current controlled current source
Enhanced light transmission through metallic nanostructured films is considered. The response of nanometer annular apertures array in silver films are experimentally and theoretically investigated. The theory, the fabrication process and the experimental characterization are described. The calculations are based on a 3D Finite Difference Time Domain (FDTD) method. Concerning the experiments, optical far-field and near-field results are shown.