title: THz wave propagation in two-dimensional metallic photonic crystal with mechanically tunable photonic-bands.
abstract: Transmission and dispersion relation of THz waves in two-dimensional photonic crystal (PC) composed of metal rods are studied by using finite-difference time-domain simulation and THz time-domain spectroscopy measurement. The PC is embedded in a parallel metal plate waveguide with an air gap between the PC and one of the plates. The photonic-band-gap well-defined at small air gap narrows systematically with opening the air gap and disappears when the air gap is 2 ~ 3 times the rod height, where the two-dimensional nature of PC is destroyed. The mechanical tunability of photonic band structure would be useful in functional THz device.
authors.affiliation: Department of Quantum Matter, ADSM, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8530, Japan. j-kitagawa@fit.ac.jp
authors.forename: Jiro
authors.initials: J
authors.lastname: Kitagawa
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Kodama
authors.forename: Shingo
authors.initials: S
authors.lastname: Koya
authors.forename: Yusaku
authors.initials: Y
authors.lastname: Nishifuji
authors.forename: Damien
authors.initials: D
authors.lastname: Armand
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Kadoya