Abstract
Recently we described the implementation of complex coordinate transformation as boundary
conditions into a bidirectional eigenmode expansion propagation algorithm based on Fourier
series expansion for modeling optical field distribution in waveguide devices. In this
communication we report on the implementation of an additional coordinate transformation known
as adaptive spatial resolution into this algorithm. It helps significantly reduce the number
of expansion terms needed to reach required accuracy especially for photonics structures
containing layers of very different thicknesses and/or optical properties, e.g., metal
layers.
© 2010 IEEE
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