Open AccessHigh efficient optical focusing of a zone plate composed of metal/dielectric multilayer
Author(s) -
Hyun-Chul Kim,
Hyungduk Ko,
Mu Jeng Cheng
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.003078
Subject(s) - materials science , surface plasmon polariton , optics , dielectric , surface plasmon , zone plate , plasmon , diffraction , extraordinary optical transmission , scattering , diffraction efficiency , near field optics , optoelectronics , composite material , physics , optical microscope , scanning electron microscope
We numerically investigate the optical field enhancement by a metal/dielectric multilayered zone plate. The optical field enhancement at the focal point of a zone plate originates not only from surface plasmon polaritons (SPPs)-assisted diffraction process along the propagation direction of incident light, but also from multiple scattering and coupling of surface plasmons (SPs) along the metal/dielectric multilayer films. By comparing multilayered zone plates to a conventional monolayered zone plate, we present the effects associated with the number of building blocks and different dielectric materials in the building block on the efficiency of the transmission.