title: Tunable enhanced 0th-order transmission in a metal-dielectric hole array covered with a subwavelength liquid crystal layer.
abstract: We demonstrate tunable, enhanced 0th-order transmission through a metal-dielectric nanohole array device with a subwavelength-thick liquid crystal (LC) layer. The LC filled the nanoholes and formed a subwavelength covering layer, which is then capped by a top cover layer. The wavelength where the transmittance dip associated with the LC occurs is determined by the anisotropic refractive-index component of the LC, which is normal to the surface of the hole array. A low-refractive-index cover layer suppresses unwanted higher-order diffraction, which results in an enhancement of the 0th-order transmission, which is closely related to laterally propagating surface plasmon polaritons. The proposed design is expected to help realize tunable plasmonic devices with high optical transmittance.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Matsui
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Yoshida
authors.forename: Atsushi
authors.initials: A
authors.lastname: Miura
authors.forename: Junji
authors.initials: J
authors.lastname: Kobashi
authors.forename: Naoki
authors.initials: N
authors.lastname: Ikeda
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Sugimoto
authors.forename: Masanori
authors.initials: M
authors.lastname: Ozaki