The boundary conditions in MPB are always periodic.
Aperiodic structures are typically handled with a supercell approach.
For example, with a localized mode such as a waveguide mode, because
the field is exponetially decaying away from the waveguide, if you
make the computational cell big enough the boundary conditions
(whether periodic or whatever) are irrelevant because the field is
exponentially small at the boundary.
See also the discussion on page 257 of our book (ab-initio.mit.edu/
book).
Steven
On Jun 26, 2009, at 2:04 PM, Alyssa J. Pasquale wrote:
Is it possible to model aperiodic photonic crystals using MPB? I
have gone through the tutorials and they all seem to use periodic
boundary conditions. Any suggestions for alternatives to MPB for
aperiodic structures?
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