中文摘要：

为了设计具有更好慢光特性的光子晶体结构，分析了结构参数对光子晶体线缺陷波导结构慢光特性的影响．通过改变缺陷柱的位置和大小，用平面波展开法（PWE）分析了导模频率和群速度及色散．分析结果表明，缺陷柱的大小和介电常数的变化对导模的慢光值影响更大，而缺陷柱位置的变化则能优化慢光的群速度色散特性．根据结论，通过对波导结构进行针对性调整，可得到具有更好慢光特性的新型光子晶体结构．

英文摘要：

Effects on the slow light properties of the photonic crystal line-defect waveguide are researched for designing photonic crystal structure with excellent slow light properties. Through changing the position and the size of the defected rods, the frequency and group velocity of the guided mode and the group velocity dispersion are analyzed with plane-wave expansion （PWE） method. Analysis indicates that the group velocity of the slow light is mainly affected by the radii and dielectric constant of the defected rods, and the group velocity dispersion is decided by the change of the defected rods＇ location. The photonic crystal structures with excellent slow light properties can be achieved through designing the waveguide based on the conclusion.