Dear prof Steven and All MPB users,
I had used MPB for more than half year, however, i still very confused with the results i obtained as compare to reported publication. I was trying to calculate the band diagram for line-defect photonic crystal waveguide, triangular lattice air holes in planar photonic crystal. I am using supercell method to obtain the band diagram. -*-*-*- I found that my calculated frequency(a/lambda) for the guide mode in the line defect is always lower than those reported in journal. for example: at wavevector,k=0, my calculated frequency is 0.285(a/lambda), However, the one reported in journal(i had tried reproduce the banddiagram for at least 3 journals) is higher around 0.295(a/lambda). What is the reason for the frequency shifted to lower value in my band diagram? is it due to the supercell method itself? Any idea how can i solve it? I am waiting for your help. thank you. Regards, DC _______________________________________________ mpb-discuss mailing list mpb-discuss@ab-initio.mit.edu http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/mpb-discuss
