Towards new regimes of lattice dynamics using femtosecond time-resolved x-ray scattering

使用飞秒时间分辨 X 射线散射研究晶格动力学的新机制

• 批准号: 5373597
• 负责人: Professor Dr. Dietrich von der Linde (†)
• 金额: --
• 依托单位: Forschungsgruppe Experimentalphysik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5373597?language=en
• 关键词: Towards; new; regimes; lattice; dynamics

It is proposed to develop a laser-driven, femtosecond, keV x-ray source of high average x-ray flux. Such x-ray pulses will open up new regimes of study in lattice dynamics using elastic and inelastic x-ray scattering. Intense optical excitation will be used to drive strong lattice excitations leading to substantial excursions of the lattice atoms from their equilibrium position. These investigations will provide new information on the energy relaxation in laser-excited solids and shed light on specific coherent lattice excitations that may eventually lead to structural changes of the material.

建议开发一种激光驱动的飞秒keV高平均x射线通量的x射线源。这种X射线脉冲将开辟新的制度，在晶格动力学研究使用弹性和非弹性X射线散射。强烈的光激发将用于驱动强晶格激发，导致晶格原子从其平衡位置的实质性偏移。这些研究将提供激光激发固体中能量弛豫的新信息，并揭示可能最终导致材料结构变化的特定相干晶格激发。