On Sun, 16 Dec 2007, Karel Van Acoleyen wrote:
> the mirror-symmetry plane around the y axis, harminv does not produce
> any results, although my source is located at y = 0 so that is also
> symmetric. If I furthermore do not specify this I get a band diagram but
Actually, your source has odd symmetry.
> (set! symmetries (list (make mirror-sym (direction Z) (phase -1))))
> (set! symmetries (list (make mirror-sym (direction Y) (phase 1))))
Note that the second line overrides the first. If you want to have two
symmetries, you must set symmetries to a single list containing two
things. (Your PML lines have the same problem.)
> (set! sources (list
> (make source
> (src (make gaussian-src (frequency fcen) (fwidth df)))
> (component Hz) (center randomnumber 0 0)
This source has odd symmetry in y. See the section on "vectors and
pseudovectors" in the Meep manual on exploiting symmetry:
http://ab-initio.mit.edu/wiki/index.php/Exploiting_symmetry_in_Meep
Regards,
Steven G. Johnson
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