US-France Cooperative Research: Coherent Tevahertz(THz) Emission from Laser-Induced Ultrafast Demagnetization of Ferromagnetic Films

磁性材料中的自旋动力学对于理解磁性材料的性质以及在计算机内存和存储中的技术应用具有重要意义。这项为期三年的美法合作研究旨在利用超快速退磁方法对磁性材料进行表征。由耶鲁大学的Charles A. Schmuttenmaer领导的美国团队在太赫兹（THz）辐射和光谱学的产生和探测方面具有专业知识。由斯特拉斯堡大学的Eric Beaurepaire和Jean-Yves Bigot领导的法国团队是制造、分析和理解铁电薄膜磁性的专家。它们将共同表征当铁电薄膜被超高速激光脉冲加热时的退磁动力学。该项目涉及太赫兹光谱学的使用。美国研究生将受益于太赫兹辐射和光谱学方面的培训，以及法国研究小组为设计和表征新的铁磁材料而开发的技术。该项目由美国国家科学基金会（NSF）和法国国家科学研究中心（CNRS）联合支持。NSF将为美国研究者和研究生的访问提供支持。法国调查人员访问美国的费用由CNRS支付。

0340566SchmuttenmaerSpin dynamics in magnetic materials is of great importance for understanding their properties and for technical applications in computer memory and storage. This three-year award for U.S.-France cooperative research addresses the characterization of magnetic materials using ultra fast demagnetization methods. The U.S. team led by Charles A. Schmuttenmaer of Yale University has expertise in the generation and detection of Terahertz (THz) radiation and spectroscopy. The French group, headed by Eric Beaurepaire and Jean-Yves Bigot at the Universite de Strasbourg is expert at fabricating, analyzing, and understanding magnetism in ferroelectric thin films. Together they will characterize the dynamics of demagnetization when a ferroelectric thin film is heated with an ultra fast laser pulse. The project involves the use of THz spectroscopy. U.S. graduate students will benefit from training in THz radiation and spectroscopy and in techniques developed by the French group for designing and characterizing new ferromagnetic materials.The project is jointly supported by the National Science Foundation (NSF) and the Centre National de la Recherche Scientifique (CNRS). NSF will provide support for visits by the U.S. investigator and graduate students. The CNRS covers expenses for visits to the United States by the French investigators.