基于DCG的层状光子晶体的制备与相位测量研究

发布时间：2018-09-08 12:41

【摘要】：光子晶体是近年来人们提出的一种由人工制备而获得的光子结构,因为其特殊的光子带隙特征可以对光波进行调控而被称为“光半导体”,光子晶体以其独特的优势吸引了物理学、材料学等多个领域科研工作者们的兴趣,并有相当多的科研小组致力于制备性能优异的光子晶体器件。但是在有关光子晶体应用的报道中,大多数是基于光子晶体的振幅和频率特性而提出的,而基于相位特性的光子晶体器件报道较少。作为光波的一个重要参量,相位在光波调控中也同样起着至关重要的作用,因此对光子晶体的相位特征进行实验研究具有重要的应用意义。本论文基于激光全息光刻技术,利用重铬酸盐明胶(DCG)感光材料制备了一维层状光子晶体;搭建白光干涉测量系统,对所制备的层状光子晶体进行了带隙内反射相位的测量研究。具体研究内容如下:1介绍了光子晶体的概念,光子晶体的发展前景、研究现状以及常用的制作方法,分析了光子晶体的相位特征及其潜在的应用。并基于全息光刻技术,利用DCG感光材料的自支撑特性,采用不同的实验条件制备了层状光子晶体。2使用光纤光谱仪对所制备的层状光子晶体进行了带隙光谱测量与分析。测量结果表明,利用DCG材料可获得带隙品质良好的层状光子结构,随着制备入射角的增大,光子带隙位置往长波方向移动;利用扫描电子显微镜对所制备的样品层状结构进行了测试表征。3搭建了白光干涉相位测量系统,分析了基于双光束干涉的相位测量原理与数据处理方法;为了对比分析光子晶体对光波产生的反射相位特性,首先对均匀光学玻璃和DCG光刻胶膜层的反射相位进行了测量;在此基础上对所制备的层状光子晶体带隙内的反射相位进行了测量研究与分析,结果与文献给出的理论分析结果相吻合。
[Abstract]:Photonic crystal is a kind of photonic structure obtained by artificial fabrication in recent years. It is called "optical semiconductor" because its special photonic band gap characteristics can regulate the light wave. Photonic crystals have attracted the interest of many researchers in physics, materials science and other fields because of their unique advantages, and a considerable number of research groups are devoted to the preparation of photonic crystal devices with excellent performance. However, most of the reports on the application of photonic crystals are based on the amplitude and frequency characteristics of photonic crystals, but there are few reports on photonic crystal devices based on phase characteristics. As an important parameter of light wave, phase also plays an important role in the control of light wave, so it is very important to study the phase characteristics of photonic crystal experimentally. Based on laser holographic lithography, one-dimensional layered photonic crystals were prepared by using dichromate gelatin (DCG) photosensitive materials, and a white light interferometry system was set up to measure the in-band reflection phase of the prepared layered photonic crystals. The main contents of this paper are as follows: 1. The concept of photonic crystal, the development prospect of photonic crystal, the present research situation and the common fabrication methods are introduced. The phase characteristics of photonic crystal and its potential application are analyzed. Based on holographic photolithography and using the self-supporting characteristics of DCG photosensitive materials, the layered photonic crystal .2 was prepared under different experimental conditions. The band gap spectrum of the layered photonic crystals was measured and analyzed by optical fiber spectrometer. The measurement results show that the layered photonic structure with good bandgap quality can be obtained by using the DCG material. With the increase of the incident angle, the position of the photonic band gap moves to the direction of long wave. The white light interferometric phase measurement system was constructed by using scanning electron microscope (SEM) to measure and characterize the layered structure of the sample. The principle and data processing method of phase measurement based on double beam interference were analyzed. In order to compare and analyze the reflection phase characteristics of photonic crystal to light wave, the reflection phase of homogeneous optical glass and DCG photoresist film is measured firstly. On this basis, the reflection phase in the band gap of the layered photonic crystal is measured and analyzed. The results are in agreement with the theoretical results given in the literature.
【学位授予单位】：青岛科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：O734

【参考文献】