玻璃中功能晶体的析出控制与应用探索

发布时间：2018-02-02 01:45

本文关键词： 飞秒激光玻璃功能晶体晶体分布　出处：《华南理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：玻璃中析出功能晶体的研究已经有很长的历史,微晶玻璃在建筑、光学器件和人工关节等方面具有广阔的应用,近年来信息技术发展迅速,光学元件的微型化、集成化是光电子信息技术发展的助推剂,将功能晶体空间选择性地集成在玻璃中能有效地促进光学元件的微型化、集成化。传统的热处理方法并不能有效地控制功能晶体在玻璃中的析出。因而研究者尝试研究在玻璃中控制析出功能晶体,以满足当今光电子技术中光学器件集成化与微型化的发展要求。飞秒激光(fs,10-15s)具有高度空间选择性和超高脉冲峰值功率,在高重复频率飞秒激光辐照玻璃过程中,由于非线性激发和非线性吸收作用,玻璃的辐照区能够不断积累热量导致温度上升。当玻璃辐照区的局域温度在晶体成核和生长温度范围内,功能晶体就会在玻璃中选择性析出。本文运用高重复频率飞秒激光在三个玻璃体系中诱导玻璃中不同功能晶体的析出,并对晶体分布进行了相应表征以及探索了其潜在应用。具体可分为以下几个方面:1.运用高重复频率飞秒激光对Ba F2-Al2O3-B2O3体系玻璃进行诱导处理,成功地实现了玻璃中深紫外非线性晶体Ba Al BO3F2的控制析出,并表征了晶体在诱导区的分布,研究了激光能量和曝光时间对Ba Al BO3F2晶体二次谐波强度的影响,最后探索了其用于产生深紫外相干光后应用于3D集成光电子器件的可行性。2.运用高重复频率飞秒激光实现了Si O2-Al2O3-Zn O-K2O体系玻璃中半导体Zn O晶体的析出控制。XRD和拉曼光谱用来表征玻璃中半导体Zn O晶体的析出。拉曼光谱和拉曼成像表征了辐照区Zn O晶体的析出分布,运用EPMA和计算模拟辐照区的温度分布来分析Zn O晶体分布规律的形成机理。同时我们也研究了激光能量和曝光时间对Zn O晶体的析出含量影响。基于玻璃中Zn O晶体的可控微区荧光,我们探索了其作为三维光存储器的应用可行性。3.研究了Zn O-Te O2-P2O5体系玻璃的结构与光学性能。利用吸收光谱,拉曼光谱和高分辨率透射电子显微镜(HRTEM)分析了玻璃颜色的起源和玻璃的网络结构。意外地是,我们并没有发现这些磷碲酸盐玻璃中存在Te金属颗粒,却出现了Zn Te量子点。同时我们用Z-扫描技术演示了这些含Zn Te量子点的玻璃的三阶非线性光学性能。我们运用高重复频率飞秒激光诱导了玻璃中半导体Zn Te纳米晶体的析出重新分布,拉曼光谱和拉曼成像表征了Zn Te纳米晶体的空间再分布规律。飞秒激光诱导玻璃中功能晶体的选择性析出在集成光学器件方面具有诱人的应用前景。
[Abstract]:The research of precipitated functional crystals in glass has a long history. Glass-ceramics have been widely used in architecture, optical devices and artificial joints. In recent years, information technology has developed rapidly and optical elements have been miniaturized. Integration is a booster for the development of optoelectronic information technology. The spatial selective integration of functional crystals in glass can effectively promote the miniaturization of optical elements. Integration. Traditional heat treatment methods can not effectively control the precipitation of functional crystals in glass, so researchers try to study the control of functional crystals in glass. In order to meet the needs of the integration and miniaturization of optical devices in optoelectronic technology, femtosecond laser fsn 10-15 s) has high spatial selectivity and high pulse peak power. In the process of high repetition rate femtosecond laser irradiation glass, nonlinear excitation and nonlinear absorption. When the local temperature of the irradiated region of glass is in the range of crystal nucleation and growth temperature. In this paper, the high repetition rate femtosecond laser is used to induce the precipitation of different functional crystals in three glass systems. The crystal distribution has been characterized and its potential application has been explored. It can be divided into the following aspects: 1. Using high repetition frequency femtosecond laser to Ba. F _ 2-Al _ 2O _ 3-B _ 2O _ 3 glasses were treated by induction. The controlled precipitation of Ba Al BO3F2, a deep ultraviolet nonlinear crystal in glass, was successfully realized, and the distribution of the crystal in the induced region was characterized. The effects of laser energy and exposure time on the second harmonic intensity of Ba Al BO3F2 crystal have been investigated. Finally, the feasibility of its application to 3D integrated optoelectronic devices after generating deep ultraviolet coherent light is explored. 2. The Sio _ 2-Al _ 2O _ 3-Zn is realized by using high repetition rate femtosecond laser. Precipitation Control. XRD and Raman Spectroscopy of Semiconductor Zn O in O-K2O system Glass to characterize Semiconductor Zn in Glass. The precipitation of O crystals was characterized by Raman spectroscopy and Raman imaging. The formation mechanism of Zno crystal distribution was analyzed by EPMA and the temperature distribution of simulated irradiation region. At the same time, we also studied the effect of laser energy and exposure time on Zn. Based on the controllable micro-region fluorescence of Zno crystal in glass, the precipitate content of O crystal is affected. We have explored the feasibility of its application as 3D optical memory. 3. The structure and optical properties of ZnO-Te O _ 2-P _ 2O _ 5 glasses have been studied. Raman spectroscopy and high resolution transmission electron microscopy (HRTEM) have analyzed the origin of glass color and the network structure of glass. We do not find Te particles in these phosphorous tellurite glasses. But there are Zn-Te quantum dots. And we have demonstrated these zinc-containing quantum dots using Z- scanning technology. The third order nonlinear optical properties of Te quantum dots. The precipitation redistribution of ZnTe nanocrystals in glass was induced by high repetition frequency femtosecond laser. The spatial redistribution of ZnTe nanocrystals was characterized by Raman spectroscopy and Raman imaging. The selective precipitation of functional crystals in glass induced by femtosecond laser has attractive applications in integrated optical devices.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ171.6

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