Relaxation, Coherence, and Optical Control of Time-Dependent Molecular Condensed-Phase Dynamics

时变分子凝聚相动力学的弛豫、相干性和光学控制

• 批准号: 9970918
• 负责人: Jeffrey Cina
• 金额: $ 30.1万
• 依托单位: University of Oregon Eugene
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-08-15 至 2003-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9970918&HistoricalAwards=false
• 关键词: Relaxation; Coherence; Optical; Control; Time

Jeffrey Cina is supported by a grant from the Theoretical and Computational Chemistry Program to continue his theoretical research in the area of coherence and optical control of time-dependent condensed-phase molecular systems. Cina seeks to develop a comprehensive theory of ultrashort-pulse propagators that will facilitate the simulation of a wide variety of time-resolved nonlinear optical experiments and provide a useful tool for the further development of optical control of molecules and solids. Various types of relaxation processes that influence the rate of electron- and energy-transfer within and between molecules will also be investigated. Specific relaxations to be investigated include those exhibiting coherent changes in the electronic ground state; those featuring large-amplitude size or shape changes in the electronic ground state; and those involving long-range superpositions between classically distinguishable intra-molecular or host-medium configurations. The proposed work will use a combination of formal analytical theory and computational simulation, and will involve a direct collaboration with the several experimental groups.Ultra-short pulses of laser light provide a powerful means to place matter into unusual states, far from thermal equilibrium. These states may have unusual chemical or material properties quite different from those of condensed matter in its more normal states. The work under this grant involves theoretical studies which explore the properties of these unusual states as well as how they may be prepared and how they may be detected. The work is being carried out in close and direct contact with people who are making related experimental studies. In this way, the understanding coming from the theoretical work is being applied, in the near term, to the analysis and interpretation of experimental data.

Jeffrey Cina得到了理论和计算化学计划的资助，继续他在时间依赖性凝聚相分子系统的相干性和光学控制领域的理论研究。 Cina旨在发展超短脉冲传播子的综合理论，这将有助于模拟各种时间分辨的非线性光学实验，并为进一步发展分子和固体的光学控制提供有用的工具。 也将研究影响分子内和分子间电子和能量转移速率的各种类型的弛豫过程。 要研究的具体弛豫包括那些表现出相干变化的电子基态;那些具有大幅度的大小或形状变化的电子基态;和那些涉及经典可区分的分子内或主机介质配置之间的长程叠加。 这项工作将使用正式的分析理论和计算模拟相结合，并将涉及与几个实验小组的直接合作。超短脉冲激光提供了一种强大的手段，将物质置于远离热平衡的不寻常状态。 这些状态可能具有不寻常的化学或材料性质，与凝聚态的正常状态大不相同。这项资助下的工作涉及理论研究，探索这些不寻常状态的性质，以及如何准备它们以及如何检测它们。 这项工作是在与进行有关实验研究的人密切和直接接触的情况下进行的。通过这种方式，从理论工作中获得的理解在短期内被应用于实验数据的分析和解释。