物理学报2024，Vol.73Issue(15)：154-167,14.DOI:10.7498/aps.73.20240646
超快自旋动力学:从飞秒磁学到阿秒磁学
Ultrafast spin dynamics:From femtosecond magnetism to attosecond magnetism
杨旭 1冯红梅 2刘佳南 3张向群 4何为 4成昭华5
作者信息
- 1. 松山湖材料实验室,阿秒科学中心,东莞 523808||中国科学院物理研究所,磁学国家重点实验室,北京 100190
- 2. 松山湖材料实验室,阿秒科学中心,东莞 523808
- 3. 中国科学院物理研究所,磁学国家重点实验室,北京 100190||中国科学院大学物理科学学院,北京 100049
- 4. 中国科学院物理研究所,磁学国家重点实验室,北京 100190
- 5. 松山湖材料实验室,阿秒科学中心,东莞 523808||中国科学院物理研究所,磁学国家重点实验室,北京 100190||中国科学院大学物理科学学院,北京 100049
- 折叠
摘要
Abstract
Ultrafast spin dynamics is the study of the evolution of spin degrees of freedom on a time scale from picoseconds to attoseconds after being excited by an external field.With the development of laser technology,ultrafast spin dynamics has presented new opportunities for realizing ultrafast spintronic devices since 1996.However,despite decades of development,many aspects of femtosecond magnetism remain unclear.Understanding the parameters of these ultrafast spin dynamics processes requires experiments on an even faster timescale.Attosecond magnetism and the interaction of attosecond laser pulses with magnetic materials can reveal spin dynamics on a sub-femtosecond to attosecond time scale.In this review,we first introduce the significant research progress,including the mechanisms of ultrafast demagnetization,all-optical switching,ultrafast spin currents,and terahertz waves.Secondly,we analyze the problems in ultrafast spin dynamics,such as the unclear physical mechanisms of ultrafast demagnetization,the uncertain relationship between magnetic damping and ultrafast demagnetization time,and the unexplored anisotropic ultrafast demagnetization.Thirdly,we discuss the opportunities and challenges in attosecond magnetism.Finally,we analyze and discuss the future development and prospects of ultrafast spin dynamics.关键词
超快自旋动力学/飞秒磁学/阿秒脉冲/阿秒磁学Key words
ultrafast spin dynamics/femtosecond magnetism/attosecond laser pulse/attosecond magnetism引用本文复制引用
杨旭,冯红梅,刘佳南,张向群,何为,成昭华..超快自旋动力学:从飞秒磁学到阿秒磁学[J].物理学报,2024,73(15):154-167,14.
