Surface Modes of Honeycomb Plasmonic Photonic Crystal for both TE and TM Polarizations

Abstract

To excite surface modes of photonic crystal for both transverse-electric (TE) and transverse-magnetic (TM) polarizations, we put forward a honeymoon lattice of plasmonic photonic crystal composed of dielectric and metallic rods. We investigate the band dispersions of the photonic crystal by finite element method (FEM) and supercell method. The surface modes for both TE and TM polarizations can be simultaneously excited on the zigzag edge. The surface modes on the metallic edge have near-zero group velocity. By introducing the surface defect into the zigzag metallic edge, the surface modes on the edge can be tuned and have negative group velocity.