On May 27, 2009, at 4:39 AM, Hassan Aghababaeian wrote:
I am studying the effect of the defect width of PC waveguide on
dispersion curve.
The CTL file is attached.
first I erase three row of the holes in middle, and add two rows
with a displacement in y direction.
As you see the attached epsilon files for different displacement,
you can see the rows are shifted in x direction as well.
You didn't attach your whole ctl file, but I'm guessing that the
reason is that your geometry-lattice is not orthogonal. The
coordinates for positions are specified in the basis of the lattice
vectors, not in Cartesian coordinates (although you can convert
between the two with the cartesian->lattice function).
It will probably be easier if you define your line defect using an
orthogonal supercell. See, for example:
http://thread.gmane.org/gmane.comp.science.photonic-bands/1376
Steven
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