title: High efficient optical focusing of a zone plate composed of metal/dielectric multilayer.
abstract: 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.
authors.affiliation: Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843-3128,USA. khc99@tamu.edu
authors.forename: Hyun Chul
authors.initials: HC
authors.lastname: Kim
authors.forename: Hyungduk
authors.initials: H
authors.lastname: Ko
authors.forename: Mosong
authors.initials: M
authors.lastname: Cheng