Open AccessEfficient terahertz slot-line waveguides
Author(s) -
Hamid Pahlevaninezhad,
Barmak Heshmat,
T.E. Darcie
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.000b47
Subject(s) - terahertz radiation , optics , transmission line , attenuation coefficient , slot antenna , line (geometry) , conductor , waveguide , materials science , absorption (acoustics) , physics , optoelectronics , telecommunications , radiation pattern , computer science , geometry , mathematics , antenna (radio) , composite material
We present two solutions to the challenge of radiation loss of slot-lines at terahertz frequencies: using a slot-line in a homogeneous medium, and using a slot-line on a layered substrate. A theoretical analysis of the slot-line in a homogeneous medium as a terahertz transmission line is presented. The absorption coefficient is obtained in terms of the waveguide dimensions using the field distribution of the slot-line. Results show that the slot-line in a homogeneous medium and the slot-line on a layered substrate can be effective transmission lines for terahertz waves with 2 cm(-1) and 3 cm(-1) absorption due to conductor loss. Full-wave numerical simulations using the Finite Element Method (FEM) are applied to validate the theory.