题目：Taking a snapshot of the electronic wave packet with an attosecond flash: Revealing the energy-time characteristics of photoelectrons

报告人：刘昆陇 副教授

单　位：大湾区大学

主持人：倪宏程 研究员

时间：2025年9月3日（周三）14:30至16:30

地点：闵行校区光学大楼B325会议室

报告人简介：

刘昆陇，大湾区大学物质科学学院长聘副教授，曾就职于德国马克斯普朗克微结构物理研究所理论部、华中科技大学物理学院，长期从事激光驱动原子分子超快动力学的理论研究及数值模拟，在Physical Review Letters、Nature Physics、Physical Review A等期刊发表40余篇学术论文，主持国家自然科学基金面上项目、青年项目等，并参与国家重大科研仪器研制项目、国家重点研发计划，曾获湖北省优秀博士学位论文奖，入选省级HWGCC人才计划、东莞市百名博士专业人才计划等。

报告内容简介：

Timing the laser-induced ultrafast electronic dynamics without intercepting the interaction is essential for advancing attosecond physics, yet it remains a significant challenge. In this talk, I will introduce an observation scheme using isolated attosecond pulses (IAPs) for time-resolving the strong-field ionization driven by multicycle laser pulses. Our approach utilizes the interference between the electronic wave packets emitted by the driving pulse and the one produced by a time-delayed IAP. We demonstrate that the photoelectron spectral phase can be encoded in and retrieved from the spectral interference structures. Furthermore, we reveal the birth-time distributions of the photoelectrons and their distinct energy-time characteristics in multiphoton and tunneling ionization. Our study explores a promising application of IAPs for ultrafast measurement and opens a viable venue for investigating quantum dynamics with quantum phase information.