摘要本次课题的研究方向是3D微结构在材料增强吸收方面的应用。此次，研究的3D微结构在二维方向上是基于光子晶体二维结构，在z方向上增加了厚度。研究方法采用的是时域有限差分法。这个方法是利用FDTD软件进行的仿真模拟，通过二维方向上晶格排列方式的变化，可以得到其吸收、透射以及反射率。因此，可以通过吸收率来研究3D微结构的变化带来的影响。本次毕设的目的是深入了解3D微结构及特性分析，学习时域有限差分法的相关知识，重点掌握FDTD软件的应用。在现实中，研究材料的吸收也有很重要的作用，既可以应用在民事领域，又可以应用在军事领域，例如在光纤领域，它的应用具有非常优良的弯曲效应，可以忽略能量的损失，因为吸收很少，传输特性良好[1]。在电磁防护领域，既可以用于电磁屏蔽，又可以用于电磁波吸收[2]。49684

 关键词  FDTD  时域有限差分法光子晶体3D微结构  

毕业论文设计说明书外文摘要

Title  Study on the application of 3D micro structure in  the material  of enhanced absorption                                                                   

Abstract

The research direction of topic is 3D micro structure enhanced absorption in the  materials. The research of 3D micro structure in two-dimensional direction is based on the two-dimensional photonic crystal structure, the thickness increased in the Z direction. The research method is FDTD . This method is the simulation of FDTD solutions, through the two-dimensional direction change of lattice arrangement, so we can obtain the absorption, transmission and reflectivity. Therefore, effects can be brought about by the absorption rate of 3D micro structure change. The design objective is to understand the structure and properties of 3D micro analysis, study and knowledge of the finite difference time domain method and learn the key to master the application of FDTD software. In reality, the research material absorption also has a very important role, not only can be used in civil field, and can be applied in the military field, such as in the field of fiber, with its application There is a very good bending effect, you can ignore the loss of energy, because of little absorption, good transmission characteristics of [1]. in the field of electromagnetic protection, can be used for electromagnetic shielding, but also can be used for electromagnetic wave absorption [2]. 

Keywords  FDTD   finite difference time domain method  photonic crystal3D micro structure

 目次

1  引言（或绪论） 1

1.1  光子晶体的概述 1

1.2  研究方法 3

1.3  应用 4

2  FDTD算法分析 5

2.1  FDTD公式分析 5

2.2  直角坐标系下FDTD方程 7

2.3   稳定性要求 9

3  仿真结果分析 10

3.1薄膜 10

3.2四方晶格 11

3.2三角晶格 11

3.4六方晶格 12

3.5 星芒结构 14

3.6 小结 15

结  论