Dirac Dispersion in Two-Dimensional Photonic Crystals

Figure 5

(a) The band structure of a alumina vein structure for the TE polarization, with the thickness of the vein equal to 0.176𝑎. At the 𝑀 point, a conical dispersion intersects with an extra sheet. A closeup of the band diagram contour of the blue solid region is shown in the inset. (b) The field distributions for a Gaussian beam incidence deviate from what is expected for homogeneous 𝜀=𝜇=0 medium (Figure 2(a)).

(a)

(b)