On Sun, 11 Mar 2007, Ryan Hao wrote:
I want to plot the band structure of photonic crystals slab with defect line which is used as waveguide. One example is shown by Fig.7 in steven's paper"Linear waveguides in photonic-crystal slabs". The structure is triangular lattice of air holes extending through both a high-index ~e of 12.0! finite-height dielectric slab and low-index ~e of 2.0! semi-infinite dielectric regions above and below. The holes have lattice constant a and radius 0.3a, while the high-index slab is of thickness 0.5a. I simulate this structure in MPB and get the band structure. The band structrue looks similar to steven's Fig.7,at least the trend is.But my figure is a little lower at each point compared with Fig.7. I can't find what the problem is.Anyone can point out why my figure is lower for the some structure? I think I specified the correct geometry because I check by h5topng,and the picture is shown below:
How much is a "little lower"? The accuracy of the MPB is better than the accuracy of the old code I was using for that paper (and I don't remember what resolution I was using then either).
Steven _______________________________________________ mpb-discuss mailing list [email protected] http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
