Finite Element Modal Analysis of Surface Plasmonic Waveguides
Date Issued
2007
Date
2007
Author(s)
Yeh, Han-Chih
DOI
en-US
Abstract
This research is mainly concerned with the study of surface plasmonic waveguide
problems using full-vectorial finite element imaginary-distance beam propagation
method (FE-ID-BPM). We analyze a waveguide problem using FE-ID-BPM solver
with curvilinear hybrid edge/nodal elements to avoid spurious solutions. Moreover,
the FE-ID-BPM solver is incorporated into the perfectly matched layer (PML) absorbing
boundary condition and can solve the leaky waveguide mode very accurately.
Numerical analysis considered in this research include square waveguide, metal slot
line, -wedge surface plasmonic waveguide, V-shape surface plasmonic waveguide,
metal strip line, strip waveguide, and directional coupler. There exist many interesting
features in our studied devices, for example, propagation length for subwavelength
surface plasmonic waveguides, the field profiles, the dispersion relation and
so on. We also plot the power flow diagrams in the cross-sectional plane for the
waveguide structures needed. All the waveguides which we mentioned before are
discussed in detail.
Subjects
電漿
波導
模態
surface plasmon
surface plasmonic
ID-BPM
finite elemnet
Type
thesis
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