Persistent IR Spectral Holeburning in Glasses, Glass-Like Crystals and Crystals

玻璃、类玻璃晶体和晶体中的持续红外光谱烧孔

• 批准号: 8918894
• 负责人: Albert Sievers
• 金额: --
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-11-01 至 1994-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8918894&HistoricalAwards=false
• 关键词: Persistent; IR; Spectral; Holeburning; Glasses

The purpose of the proposed research is to identify and characterize persistent IR spectral effects in a variety of crystalline and disordered solids. The technique provides a high resolution window into defect dynamics and the local environment, measures the excited vibrational state dephasing time and probes the low lying non-equilibrium elastic configurations in both crystalline and disordered solids. Four different types of systems will be explored: 1) glass-like crystals will provide a new approach for studying low lying states in glasses; 2) the apparent strong interaction between persistent photodarkening and persistent IR hole burning in chalcogenide glasses; 3) whether glassy behavior in polymers translates into persistent spectroscopic effects; 4) whether the impurity-induced far IR spectrum associated with heavy metal impurities in alkali halides is persistent.

拟议的研究的目的是识别和表征各种晶体和无序固体中持续的红外光谱效应。 该技术为缺陷动力学和局部环境提供了一个高分辨率的窗口，测量了激发的振动状态，并探测了晶体和无序固体中低谎言的非平衡弹性构型。 将探索四种不同类型的系统：1）类似玻璃的晶体将提供一种新的方法，用于研究玻璃杯中的低谎言状态； 2）持续的光标记和持续的红外孔燃烧葡萄干剂玻璃杯之间的明显强烈相互作用； 3）聚合物中的玻璃行为是否转化为持续的光谱效应； 4）杂质引起的与重金属杂质在碱卤化物中相关的远红外光谱是否持续。