Photonic crystal splitter based on surface wave

With the method of exciting surface wave of photonic-photonic, a new compound structure made up of surface modified photonic is designed. Using plane wave expansion method and super cell technology, mode dispersion relations of coupled surface for this structure was studied. Furthermore, numerical simulation of light beam in this structure by finite-difference time-domain (FDTD) method, and analysis of its physical mechanism were carried out. It is found that beam splitting is obtained for incident light of a certain frequency range. This finding can be used to design a beam splitter.