摘要
A new structure based on a semi-circular photonic crystal is proposed to achieve asymmetric light propagation. The semi-circular photonic crystal structure proposed in this paper is a deformation of a two-dimensional conventional square photonic crystal. Through the directional bandgap of the semi-circular photonic crystal, the light from one direction can transfer to the other side, but the light from the opposite direction cannot. A high contrast ratio is obtained by designing the constitutive parameters of the photonic crystal and choosing the suitable light frequency. This structure promises a significant potential in optical integration and other areas.
A new structure based on a semi-circular photonic crystal is proposed to achieve asymmetric light propagation. The semi-circular photonic crystal structure proposed in this paper is a deformation of a two-dimensional conventional square photonic crystal. Through the directional bandgap of the semi-circular photonic crystal, the light from one direction can transfer to the other side, but the light from the opposite direction cannot. A high contrast ratio is obtained by designing the constitutive parameters of the photonic crystal and choosing the suitable light frequency. This structure promises a significant potential in optical integration and other areas.
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.60907005,10804063,and 51102148)
the Natural Science Foundation of Shandong Province,China(Grant Nos.ZR2011FQ011 and ZR2010AM025)
the Natural Science and Technology Program of Shandong Province,China(Grant No.2011GGH20119)
the Research Award Fund for Outstanding Young Scientists of Shandong Province,China(Grant No.BS2011DX023)
the Science&Technology Bureau of Shenzhen City,China(Grant No.0014632063100426032)
the Independent Innovation Foundation of Shandong University,China(Grant No.2010TB019)
