Title :
Finite Element Solutions of Surface-Plasmon Modes in Metal-Clad Dielectric Waveguides at THz Frequency
Author :
Themistos, Christos ; Rahman, B. M Azizur ; Rajarajan, M. ; Rakocevic, V. ; Grattan, K.T.V.
Author_Institution :
Sch. of Eng. & Math. Sci., City Univ., London
Abstract :
Finite element analysis, based on the vector H-field formulation and incorporating the perturbation technique, is used to calculate the complex propagation characteristics of metal-coated dielectric waveguides at terahertz frequencies. The propagation and attenuation characteristics of surface-plasmon modes (SPMs) at the metal/dielectric interfaces are presented. The effects on the modal properties of metal-clad dielectric guides with the cladding thickness and the formation of the supermodes due to coupling between the SPMs in the presence of different surrounding materials are also investigated
Keywords :
finite element analysis; optical waveguide theory; submillimetre wave devices; surface plasmons; cladding thickness; finite element analysis; metal-clad dielectric waveguides; perturbation technique; supermodes; surface-plasmon modes; Dielectric materials; Electromagnetic waveguides; Finite element methods; Frequency; Optical sensors; Optical surface waves; Optical waveguides; Scanning probe microscopy; Surface waves; Waveguide components; Finite element method (FEM); metal-clad dielectric waveguides; modal solutions; surface-plasmon modes (SPM); terahertz (THz) waveguides;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2006.884542
