I am trying to look at the band structure for a slab PC structure. I used a non-defect structure to identify the bandgap for guided bands and then introduced a point defect in the center of the structure to introduce localized states in the gap. I have tried a few different supercell sizes and grid resolutions, but I have not yet "clearly" seen localized bands in the gap region.
Please see the following image of my band structure, for a 5x5x5 supercell, 10x10x10 resolution, and 85 bands plotted. http://img530.imageshack.us/img530/1847/slabdefect555supercellyf1.jpg I feel I can see one band that is approximately flat around normalized frequency 0.28, but then there are some other bands in there, as well. Is my problem due to a too-small supercell or should these other bands actually be in the gap as well? Why am I trying to use MPB rather than MEEP to find resonant band frequencies? I am new to both of these software packages and cannot understand yet how to simulate non-rectangular unit cells in MEEP (despite your posts on this on theMEEP list). But that is a discussion for a different list. Thank you, Rob _______________________________________________ mpb-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
