【作者】 龚跃球；

【导师】 赵修建；

【作者基本信息】 武汉理工大学 ， 材料学， 2002， 硕士

【摘要】 随着光通讯的发展和光计算机研究工作的不断展开，对性能优良的二阶非线性光学材料的需求已变得越来越迫切。硫系玻璃作为一种非线性光学材料，具有一系列的优异性能，并将具有广阔的应用前景。 为了探索高性能的二阶非线性光学材料，并根据以前的研究成果发现硫系玻璃中极化区域主要位于表面层，本论文主要研究硫系玻璃及其薄膜的二阶非线性及其它相关性质。首先采用石英管熔封制得了不同砷、锗含量的Ge-As-Se块状玻璃，并测试了其相关性能；接着对样品进行了电子束极化和电场温度场极化，然后用热诱导退极化电流（TSDC）法研究了玻璃的极化机理，并从理论上探讨了极化的宏观和微观机理；还用化学池沉积法和真空蒸镀法分别制备了硫系玻璃薄膜并进行了相关性能检测。 实验结果表明：Ge-As-Se三元体系在富硒区域成玻性能良好，在空气中冷却就可成较大块状的玻璃。样品极化后的结果表明，玻璃中出现了比较明显的TSDC峰，并且用电场温度场极化的效果要比用电子束辐射极化的要好，这表明由于二次电子的发射和吸收电子的存在以及偶极子的定位取向导致硫系玻璃中存在大量的结构缺陷，容易被极化，很有可能具有较强的二阶非线性光学性能。用化学池沉积法制备了Zn_xCd_1-xS薄膜，并进行了相关性能检测，结果表明：Zn_xCd_1-xS薄膜在0.4＜X＜0.6时既有较大的晶粒尺寸，又有较小的电阻，可望替代部分CdS用于太阳电池中。还尝试用真空热蒸发制备了硫系玻璃薄膜。最后介绍了一种仅通过薄膜的反射和透过光谱来计算薄膜的有关常数的方法。更多还原

【Abstract】 With the development of optical fiber communication and continuous research on all-optical computer, it has become more and more essential outstanding character of second-order nonlinearity optical materials. As one kind of second-order nonlinearity optical materials, glass own a series of excellent characters and will be used widely in the future.In order to exploit high performance second order optic materials, and because of the formal foundation that the region of polarization of chalcogenide glasses was exits only in the superficial layer, this paper wanted to investigate the properties and characteristic of chalcogenide glass films.First, various content of arsenic in the Ge-As-Se systems was made by sealed quarts tubes. Then the polarization mechanism of Ge-As-Se glass after electron-beam irradiation and temperature/ electric-field poling was studied by TSDC(thermally stimulated depolarization current)technique, and also research the micro-cosmic mechanism. Finally, we made chalcogenide glass films by CBD (chemical bath deposition) and vacuum thermal evaporation.The experiment results indicate that the Ge-As-Se systems’s glass formation ability was very good in the Se-rich area, bulk glasses could be obtained even cooled naturally in air. After the electron-beam irradiation and temperature/electric-field poling, there are TSDC peak in both poling ways, but the latter was better because the cause of the latter is not only including the emission of the second electron and the existence of the absorbing electron, but also including of the tropism doublet. It is show that because there are many structure defects in the chalcogenide glass, it is easy to polarization, and also maybe had better second-order optical nonlinearity. Then, from the research result of ZnxCd(1-x) S film ,we find that it can replace part of CdS in the solar cells when X is between 0.4 and 0.6. At last, we can calculate the optical constants of chalcogenide films upon a transparent substrate only from the optical transmission and reflection spectrum.更多还原