【作者】 袁亮；

【导师】 汪国平；

【作者基本信息】 武汉大学 ， 光学， 2005， 硕士

【摘要】 光子晶体,也称为光子带隙材料,是1987年才提出的概念,在近十几年当中获得了巨大的发展,并且已经成为现代光电子技术,传感器件,通信和材料领域等共同关注的研究热点。 本文对现有的制备光子晶体的方法进行了比较,认为全息干涉法制备的样品面积大,均匀性好,无缺陷,速度快,成本低,一旦解决了感光材料的折射率问题,便是适于工业生产的一种优化的方法。我们的研究小组一直以来都是用全息干涉法进行光子晶体的制备实验。 本文的主要工作和创新集中在全息法制备光子晶体的光束设计,具体包括: (1)提出倒格初基锥的概念,证明任意一种Bravais格子形式的光场都能由多种四光束配置干涉形成。在特定波长下,格点形状和晶格周期都是可调的。 (2)进一步考察了半空间的四光束配置,或者可以称之为泛伞形配置,证明任意一种Bravais格子都能由半空间光束配置干涉生成。 (3)提出并分析了用四光束干涉的方法制备二维光子晶体双模结构的方法,这种结构能有效增大光子晶体的禁带宽度。实验上用光学显微镜拍摄了双模结构的光场分布。 本文的工作可以为人们进一步用全息干涉法制备各种光子晶体打下基础。更多还原

【Abstract】 Photonic crystal (PCs), also known as photonic band gap (PBG) material, was a concept that was not introduced to people until 1987, and now have become a common research field through optoelectronics, sensors, optical telecommunication to materials science.This thesis contains a comparison between current main strategies for fabrication of PCs, especially for three-dimensional (3D) PCs, which results in a conclusion that holographic lithography can produce a PC template with large area, submicron resolution, defect-free structure, and a strict uniformity by using a simple setup through a fast and low cost process. Our group has been keeping using this method to carry out PC-fabricating experiments.This thesis pays main attention to wave design, including:(1) Introducing a concept of reciprocal primitive pyramid (RPP) and testifying that the same given Bravais lattice can be formed by multiple configurations of four beams (CFBs). Both the lattice-point shape and lattice constant can be tunable.(2) Further studying half space configurations of four beams (HCFBs), or also so-called pan-umbrella configurations and proving that any Bravais lattice can be formed by HCFBs.(3) Proposing and analyzing the fabrication of binary PCs by interference of four laser beams. A specially designed prismoid that generates interference of four beams with binary symmetry is fabricated and optical interference field is observed with an optical microscope.This thesis may lay a foundation for further fabrication of various PC templates of interests by holographic lithography.更多还原