"MRI: Development of a Free-Space Ultrafast Spectroscopy System for Chemistry, Materials Science, and Biophysics Research And Education In The 25-T Split-Coil Helix"

“MRI：在 25-T 分裂线圈螺旋中开发用于化学、材料科学和生物物理学研究和教育的自由空间超快光谱系统”

• 批准号: 1229217
• 负责人: Stephen McGill
• 金额: $ 90.67万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-15 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1229217&HistoricalAwards=false
• 关键词: MRI; Development; Free; Space; Ultrafast

This award to Florida State University is for the development of a unique ultrafast magneto-optical spectroscopy system using the new Split-Florida Helix 25 T magnet at the National High Magnetic Field Laboratory (NHMFL). Access to optical probes in high magnetic fields (i.e. 10 T) is critical to the scientific missions of understanding quantum phenomena and strong electron-electron correlations in condensed matter systems, chemical bonding, and mechanisms of natural reactivity in biological systems. The development of this instrument will enable unprecedented free-space ultrafast and continuous-wave optical investigations in the otherwise inaccessible phase regimes of liquid helium temperatures (4 K) and ultra-high DC magnetic fields (25 T). These experiments will provide insight into fundamental processes that cannot be accessed at zero or low magnetic fields and will have an important impact in areas that include: a) probing the limits of quantum coherence in complex materials through THz measurements of dephasing times, b) exploring quantum mechanical correlations in chemical changes, c) Imaging excitons and spins in organic systems, and d) understanding interactions and changes in oxidation states in organic complexes, including bioproteins. The new ultrafast spectroscopy system will be available to the international scientific community through the user program at the NHMFL. The instrumentation will enable a transformative alternative to existing methods of materials investigations where photons will probe individual quantum states and interactions that are the origin of electronic and magnetic behavior in materials. The combination of unprecedented free-space optical access and the latest generation of ultrafast laser technology will enable seminal techniques such as multi-dimensional femtosecond spectroscopy, studies in the terahertz region of the electromagnetic spectrum, and magnetic circular dichroism imaging in high magnetic fields. The scientific program addresses fundamental research questions that have implications for our future quality of life and include studying the formation and breaking of Cooper pairs in the superconducting state, the formation of magnetic states in organic semiconductors, the oxireductase - an electron transfer process present in all living organisms, and correlations between excited states in complex biological molecules. This award will enable never-before-possible scientific pursuits while providing unique educational opportunities for undergraduate, graduate, and postdoctoral researchers, who will be the primary operators of the instrument.

这个奖项给佛罗里达州立大学是一个独特的超快磁光光谱系统的发展，使用新的分裂佛罗里达HAL 25 T磁铁在国家高磁场实验室（NHMFL）。 在高磁场（即10 T）中使用光学探针对于理解凝聚态系统中的量子现象和强电子-电子相关性、化学键合以及生物系统中自然反应机制的科学任务至关重要。 该仪器的开发将使前所未有的自由空间超快和连续波光学调查，否则无法进入液氦温度（4 K）和超高直流磁场（25 T）的相位制度。 这些实验将深入了解在零磁场或低磁场下无法访问的基本过程，并将在以下领域产生重要影响：a）通过太赫兹测量退相时间来探测复杂材料中量子相干性的极限，B）探索化学变化中的量子力学相关性，c）成像有机系统中的激子和自旋，以及d）理解有机复合物（包括生物蛋白质）中氧化态的相互作用和变化。 新的超快光谱系统将通过NHMFL的用户程序提供给国际科学界。 该仪器将为现有的材料研究方法提供一种变革性的替代方案，光子将探测作为材料中电子和磁性行为起源的单个量子态和相互作用。 前所未有的自由空间光学访问和最新一代超快激光技术的结合将使开创性的技术，如多维飞秒光谱，电磁频谱太赫兹区域的研究，以及高磁场中的磁性圆二色性成像。 该科学计划解决了对我们未来生活质量有影响的基础研究问题，包括研究超导状态下库珀对的形成和断裂，有机半导体中磁性状态的形成，氧化还原酶-所有生物体中存在的电子转移过程，以及复杂生物分子中激发态之间的相关性。 该奖项将实现前所未有的科学追求，同时为本科生，研究生和博士后研究人员提供独特的教育机会，他们将成为仪器的主要操作员。