Photonic band gaps in a two-dimensional graphite structure.

We present a design of two-dimensional periodic dielectric structures that gives rise to absolute band gaps common to E and H polarized waves. This structure is formed by an arrangement of parallel cylindrical rods centered at the vertices of regular hexagons. We show that two absolute band gaps exist for lattices of dielectric rods in air. Potential application of this structure at the submicrometer length scale is discussed.