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光子晶体的禁带特性是该新兴材料的最根本特征。本文运用平面波展开法(PWE)计算了一种正方晶格Si光子晶体材料的禁带特性,并基于该材料设计出一种红外波段的线缺陷光子晶体波导结构。运用时域有限差分法(FDTD)研究了线缺陷二维光子晶体波导宽度对通频带、电场强度及透射能量的影响,研究结果为二维光子晶体波导器件的开发和利用提供了理论支撑。
The band gap properties of photonic crystals are the most fundamental features of this emerging material. In this paper, the forbidden band characteristics of a square lattice Si photonic crystal material are calculated by the plane wave expansion method (PWE), and a line-defect photonic crystal waveguide structure is designed based on the material. The influence of two-dimensional photonic crystal waveguide width on the passband, electric field strength and transmission energy was studied by using the FDTD method. The results provide theoretical support for the development and utilization of two-dimensional photonic crystal waveguide devices.