title: Terahertz pipe-waveguide-based directional couplers.
abstract: We experimentally demonstrate a terahertz (THz) leaky mode directional coupler for future THz applications. The proposed directional coupler comprises two square pipe waveguides. The coupling efficiency is investigated for different frequencies, polarizations, and core sizes. Rectangular pipe-waveguide-based directional couplers and the issue of insertion loss are also discussed. It is found that the THz directional coupler works most efficiently in the minimal-attenuation wavelength regime.
authors.affiliation: Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei, Taiwan.
authors.forename: Jen-Tang
authors.initials: JT
authors.lastname: Lu
authors.forename: Chih-Hsien
authors.initials: CH
authors.lastname: Lai
authors.forename: Tzu-Fang
authors.initials: TF
authors.lastname: Tseng
authors.forename: Hua
authors.initials: H
authors.lastname: Chen
authors.forename: Yuan-Fu
authors.initials: YF
authors.lastname: Tsai
authors.forename: Yuh-Jing
authors.initials: YJ
authors.lastname: Hwang
authors.forename: Hung-Chun
authors.initials: HC
authors.lastname: Chang
authors.forename: Chi-Kuang
authors.initials: CK
authors.lastname: Sun
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D055053:Terahertz Radiation