I am trying to simulate the bandstructure of a single defect line PhC waveguide which is already reported in literature. When I place randomly oriented dipole cloud, I am observing 2 allowed modes in the bandgap which are actually even and odd modes. If that is the case, if I assign theta 0 or 90 degree, then ideally I should get either of these. But, eventhough I change theta value to 0 or 90, I do not see any difference in the bandstructure and still see 2 modes in the bandgap.
I even tried to change electric dipole to magnetic dipole to see if there is any difference in the bandstructure plotted, but in vain. I am attaching the simuation file of the same. Please help me regarding this.
vg_calcultion.lsf (3.7 KB)
custum_non_c_0_Si.fsp (325.6 KB)