Abstract
Novel boundary conditions based on Padé approximations for the
frequency domain two-dimensional/finite element (2-D/FE) simulation of
planar optical junctions of arbitrary geometry and number of accessing
waveguides are presented and described in detail. This efficient
formulation is straightforwardly implemented within the 2-D/FE framework
and also can easily be used in finite difference schemes. Three examples
show the applicability and reliability of the present method: a waveguide
step discontinuity, waveguide transverse displacement and T-shaped beam
splitter.
© 2004 IEEE
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