On Thu, 20 Apr 2006, Ping Ma wrote:
As a new MPB user, I have a problem on drawing PhC waveguide with honeycomb lattice geometry. For the supercell, I found I cannot make the supercell for the waveguide symmetric on both sides beside the dielectric core by varying the number of supercell in y direction. I am wondering if the MPB results are sensitive to this asymmetric supercell. Does anybody have insight to solve this problem?
It certainly should be possible to make the supercell symmetrical. Just draw a picture of what you want, make sure it is periodic in all directions, and implement it.
However, MPB should be perfectly fine with an asymmeric supercell. (If you don't have inversion symmetry, however, then you can't use mpbi and give up a factor of 2 in performance.)
Cordially, Steven G. Johnson _______________________________________________ mpb-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
