Optical transmittance of a two-dimensional triangular photonic lattice

作者：Kazuaki Sakoda · 发表于：Physical review. B, Condensed matter · 年份：1995 · DOI：10.1103/physrevb.51.4672 · 被引用次数：92 · 研究领域：Photonic Crystals and Applications、Photonic and Optical Devices、Plasmonic and Surface Plasmon Research

The optical transmittance of a slab of a two-dimensional photonic lattice composed of a triangular array of circular rods was calculated by means of the plane-wave expansion. This method naturally gives the specular and Bragg reflectivity as well. The comparison between the band structure of the relevant infinite lattice and the calculated transmittance showed a clear correspondence concerned with band gaps. However, it also showed a null coupling between the external radiation field and an internal electromagnetic mode in addition to a considerable amount of the energy transfer to the Bragg waves. This fact implies that the simple analysis of the spectra based on the state density is insufficient.