DocumentCode
270431
Title
Analysis of Straight Periodic Segmented Waveguide Using the 2-D Finite Element Method
Author
Rubio-Mercedes, C.E. ; RodriÌguez-Esquerre, V.F. ; Lima, Ivan T. ; HernaÌndez-Figueroa, Hugo E.
Author_Institution
Math. & Eng. Phys. Programs, State Univ. of Mato Grosso do Sul, Dourados, Brazil
Volume
32
Issue
11
fYear
2014
fDate
1-Jun-14
Firstpage
2163
Lastpage
2169
Abstract
A numerical analysis of periodic segmented waveguides (PSWs) using the 2-D finite element method (2D-FEM) in the frequency domain is presented. This method has significantly lower computational cost when compared with 3-D methods that have been used to model PSWs, and can also model back reflected signals. Unlike photonic crystal waveguides, light confinement in a PSW is due to total internal reflection as in a continuous waveguide (CWG). We show that the dispersion relation of the guided modes in PSW is strongly influenced by the dielectric periodicity along the waveguide. We calculate the mode profile of a PSW in a region far away from the bandgap and we showed that it is comparable to the mode profile of the equivalent CWG even for relatively high values of averaged refractive index contrast.
Keywords
finite element analysis; light reflection; optical dispersion; optical waveguide theory; refractive index; 2D finite element method; 2D-FEM; back reflected signals; bandgap; dielectric periodicity; dispersion relation; frequency domain; guided modes; light confinement; mode profile; numerical analysis; refractive index contrast; straight periodic segmented waveguide; total internal reflection; Finite element analysis; Indexes; Optical waveguides; Refractive index; Silicon; Silicon compounds; Continuum waveguide; equivalent index; finite element methods; mode profile; segmented waveguide;
fLanguage
English
Journal_Title
Lightwave Technology, Journal of
Publisher
ieee
ISSN
0733-8724
Type
jour
DOI
10.1109/JLT.2014.2321047
Filename
6807678
Link To Document