Influences of the Shape of Rods in Two Dimension Photonic Crystals on Their Defect Eigenmodes

• 作者: Guo-Hong Xiao Li-Qing Huang
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 数学
• 关键词: PHOTONIC Crystal Structure Parameter DEFECT EIGENMODE Rod SHAPE
• 年，卷（期）: 2013,（4）
• 页码范围: 296-299
• 页数: 4页
• 分类号: O1

摘要

The cross section of photonic crystal fiber (PCF) is a two dimensional photonic crystal. The rods formed in PCF are not exact cylinders, the shape of rods will affect the eigenmode formed in two dimensional photonic crystals around a defect. Based on the relations between the defect eigenmodes and the radius of dielectric cylinders, the defect eigenmodes in photonic crystals in which the ellipse rods take the place of cylinders are studied by numerical calculation. The analysis of the relation between the eigenfrequency and the minor axis radius of ellipse rods show that the defect eigenfrequency is controlled by the cross section area of rods and the distribution of electromagnetic field around the defect is also affected by the cross section shape of rods. It provides a better way to modify the distribution of electromagnetic fields in photonic crystal and keeps the eigenfrequency unchanged.