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.

拟议研究的目的是确定和 表征各种红外光谱中的持续红外光谱效应， 晶体和无序固体。 该技术提供了一个高 分辨率窗口到缺陷动态和局部环境， 测量激发振动态的退相时间， 在两种情况下， 晶体和无序固体。 四种不同类型的 系统将被探索：1）玻璃状晶体将提供一个 研究玻璃中低激发态的新方法; 2） 持续性光暗化与 硫系玻璃中的持续红外烧孔; 3）是否 聚合物的玻璃态转变为 光谱效应; 4）是否杂质诱导的远红外 与碱金属卤化物中重金属杂质有关的光谱 是持久的。