摘要光子晶体是一种新型的光学材料，它是由不同折射率的材料周期性排列而形成的人工晶体结构。它最显著的特征是光子带隙和局域特性，处于禁带中的光不能在光子晶体中传播。如果在完整的光子晶体晶格中引入缺陷，在原来的带隙中允许缺陷态存在。因此，在光子晶体中引入点缺陷，线缺陷，可形成光子晶体微腔和一文光波导，进一步利用这些缺陷以及它们的组合可以形成多种新型的光子器件。光子晶体有着十分广泛的应用领域，从微波通信，太赫兹器件到光子芯片，从通信器件，太阳能电池，生物化学传感到隐身技术，可以说，涵盖了光通讯，激光器，光子器件等非常广阔的领域。6960
本论文阐述了光子晶体的研究现状及理论基础，根据局域场微调法设计了一种光子晶体微腔结构。通过移动光子晶体微腔边缘的空气孔来平衡微腔内的布拉格散射条件与垂直方向上的全内反射来加强微腔对光的约束。通过仿真，得出了微腔模场分布并得到高的Q值，同时保持很小的尺寸，非常利于光电子器件的集成。
关键词 光子晶体 光子晶体微腔 缺陷 局域微调
毕 业 论 文 外 文 摘 要
Title Design of photonic crystal microcavity and characteristic reseach
Abstract
Photonic crystal （PhC）is a kind of novel optical material, it is artificial periodic structure made of arrays with different constant. Its outstanding feature is photonic bandgap, light frequency located in which will be forbidden at all. If some “defect” is introduced in the perfect photonic crystal lattice, some defect state will be permitted in theoriginal bandgap. So photonic crystal microcavity and one dimensional waveguide can beformed through introducing point defect and line defect respectively, and various opticaldevices can be made by using these defects and their combination.Photonic crystal has extensive applications, from microwave communication, terahertz devices to photon chips, from communication devices, sollar cell, biochemical sensor to stealth technology. It covers a very broad area including optical communication, lasers and photonic devices.
This paper expounds the current and theoretic research on photonic crystals, and how according to the local field fine tuning method a photonic crystal was constructed. The mobile photonic crystal was balanced by means of air holes located at the crystal edge, Bragg reflection conditions, and the vertical direction of the total internal reflection to strengthen the constraints of the nanocavity. Attaining a micro-cavity mode field distribution with a high Q value, while still maintaining a small size, makes photonic crystals very conducive for integration into optoelectronic devices.
Keywords Photonic crystal Microcavity Defect Local field tuning
目 次
第一章 绪论. 1
1.1 引言 1
1.2 论文研究内容2
第二章 光子晶体 3
2.1 光子晶体的概念 3
2.2 光子晶体的特性 .5
2.3 光子晶体的应用 .8
2.4 光子晶体的制备.11
2.5 本章小结.11
第三章 理论基础 12
3.1 常用数值解法 12
3.2 几种方法的比较 16
3.3 本章小结 16
第四章 光子晶体微腔 ,.17
4.1 光子晶体微腔的概念 .17
4.2光子晶体微腔的应用 .17
4.3 光子晶体微腔的研究现状 18
4.4 光子晶体微腔的基本原理 19
4.5 光子晶体微腔设计 22
4.6 数值模拟与仿真 23 光子晶体微腔的设计和特性研究仿真:http://www.youerw.com/tongxin/lunwen_4705.html