title: Terahertz band gaps induced by metal grooves inside parallel-plate waveguides.
abstract: We report experimental and finite-difference time-domain simulation studies on terahertz (THz) characteristics of band gaps by using metal grooves which are located inside the flare parallel-plate waveguide. The vertically localized standing-wave cavity mode (SWCM) between the upper waveguide surface and groove bottom, and the horizontally localized SWCM between two groove side walls (groove cavity) are observed. The E field intensity of the horizontally localized SWCM in grooves is very strongly enchanced which is three order higher than that of the input THz. The 4 band gaps except the Bragg band gap are caused by the π radian delay (out of phase) between the reflected THz field by grooves and the propagated THz field through the air gap. The measurement and simulation results agree well.
authors.affiliation: Division of Electrical and Electronics Engineering, Korea Maritime University, Busan 606-791, South Korea.
authors.forename: Eui Su
authors.initials: ES
authors.lastname: Lee
authors.forename: Jin-Kyu
authors.initials: JK
authors.lastname: So
authors.forename: Gun-Sik
authors.initials: GS
authors.lastname: Park
authors.forename: Daisik
authors.initials: D
authors.lastname: Kim
authors.forename: Chul-Sik
authors.initials: CS
authors.lastname: Kee
authors.forename: Tae-In
authors.initials: TI
authors.lastname: Jeon
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008670:Metals / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D055053:Terahertz Radiation
chemical_list: D008670:Metals