title: A systematic approach to enhance off-axis directional electromagnetic wave by two-dimensional structure design.
abstract: In this study, we propose a two-dimensional (2D) dielectric structure tailored by a systematic design approach on the exit side of a metallic aperture to enhance the off-axis electromagnetic (EM) wave. We adopted a phase field method based topology optimization scheme and designed an arbitrary 2D dielectric structure in order to steer outward beaming through an aperture to a specific direction. Beyond previous one-dimensional structure, we proposed an arbitrary 2D dielectric structure through the introduced design process defining not only x- but also y-directional dielectric structural boundaries simultaneously and experimentally confirmed enhanced EM wave transmission to a desired direction.
authors.forename: Dongyeal
authors.initials: D
authors.lastname: Lim
authors.forename: Dongheok
authors.initials: D
authors.lastname: Shin
authors.forename: Hyundo
authors.initials: H
authors.lastname: Shin
authors.forename: Kyoungsik
authors.initials: K
authors.lastname: Kim
authors.forename: Jeonghoon
authors.initials: J
authors.lastname: Yoo