Re: Defect point inside slab phc

It is rather subtle to properly compute point-defect states for slabs  
in MPB, because the point-defect states are leaky rather than  
exponentially confined.  This means that the artificial periodicity  
you impose with the supercell technique is not negligible and has a  
significant impact on the solutions.

In principle, it is still possible to do properly, and I've discussed  
it several times on this mailing list over the years (check the  
archives).  However, my short advice is: don't do it. A program with  
absorbing boundary support, like Meep, is much more appropriate for  
computing leaky modes.

Steven