Sub-picosecond Light And electron pulse to Manipulate magnetization

亚皮秒光和电子脉冲来操纵磁化

• 批准号: 530100877
• 负责人: Professorin Dr. Sangeeta Sharma, Ph.D.
• 金额: --
• 依托单位: Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (MBI)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/530100877?language=en
• 关键词: Sub; picosecond; Light; electron; pulse

The dynamic response of magnetic order to ultrafast optical excitation is a fascinating issue of modern magnetism. Indeed, the discoveries of light-induced ultrafast demagnetization in 1996 and all-optical switching in 2007 paved the way towards the development of technological applications operating on the sub-picosecond time scale. One outstanding and unsolved problem occurring after the femtosecond laser pulse excitation of ferromagnets resides in the interplay between direct light excitation and the subsequent generated ultrafast spin current resulting in various type of ultrafast magnetization manipulation. Understanding and controlling such processes can lead to combined optomagnetic/spintronic devices operating on ultra-short timescale. In this project, we will combine theory and experiment to investigate and disentangle contributions from light and current to the spin dynamics using state of the art experimental techniques and ab-initio, method of time-dependent density functional theory to understand and predict

磁阶对超快光激励的动态响应是现代磁学研究的一个热点问题。事实上，1996年光致超快退磁和2007年全光开关的发现为亚皮秒时间尺度下的技术应用发展铺平了道路。飞秒激光脉冲激发铁磁体后存在的一个突出而尚未解决的问题是直接光激发与随后产生的超快自旋电流的相互作用，导致各种类型的超快磁化操作。理解和控制这些过程可以导致在超短时间尺度上运行的组合光磁/自旋电子器件。在这个项目中，我们将结合理论和实验来研究和解开光和电流对自旋动力学的贡献，使用最先进的实验技术和abi -initio，时间依赖密度泛函理论的方法来理解和预测