基于2维光子晶体的光波导器件设计与仿真【毕业论文】.doc

- PAGE I - 本科毕业设计 （20 届） 基于2维光子晶体的光波导器件设计与仿真 所在学院 专业班级 通信工程 学生姓名 学号 指导教师 职称 完成日期 年 月 PAGE I 摘　要 【摘要】在材料科学飞速发展的今天各种材料应运而生，由于光子传输有电子无法比拟的特性所以光子晶体材料的出现受到了人们广泛的关注。本课题是以时域有限差分法（finite difference time domain简称：FDTD）为理论基础，利用XFDTD软件，构造正方点阵结构的光子晶体，通过模拟光束在无缺陷的光子晶体结构中的传播行为，得到了电磁场模拟分布图和电场数据。通过改变光束波长，仿真得到了正方点阵光子晶体的光子禁带结构。在正方点阵结构引入直线型缺陷、T型缺陷和Y型缺陷后，模拟出了在禁带光波频率下电磁场分布图和相关数据。本文还介绍了相关的理论知识如FDTD算法、光子禁带的算法、边界吸收条件的设置、软件XFDTD的背景、用法等相关知识。 【关键词】XFDTD；光子晶体材料；光子禁带；完全匹配层。 Abstract 【ABSTRACT】Today materials science is rapid developing and many materials came into being today. Because the photon can not match the characteristics of electronic in transmission, photonic crystal materials has been widespread concern for its emergence. Today the study of photonic crystal research is focused on its performance in the laboratory study, photonic crystal materials has been used in some products but large-scale using is still some time away. This topic is based on finite difference time domain method as a theoretical basis.Using XFDTD software, constructed square matrix structure and simulated electromagnetic field distribution and related data by simulating the light through the photonic crystal defect-tree structure. By changing the frequency of light to be getting the square matrices of photonic band frequency. In the frequency band in the square matrix structure introduced linear defects T-type defects and Y-type defects to simulate the relevant data. This article also describes the theory of knowledge on relevant topics Such as the FDTD algorithm, the algorithm photonic band gap, setting absorption boundary condition the background of the software XFDTD and its usage and so on. 【KEYWORDS】XFDTD; Photonic crystal materials; Photonic band gap; PML. 目　录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc303071275 摘　要 PAGEREF _Toc303071275 \h II HYPERLINK \l _Toc303071276 Abstract PAGERE