发表机构
Department of Physics and Chemistry, DGIST（物理化学系，大邱庆北科学技术院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究提出一个整合RABBIT与tr-ARPES的理论框架，识别出包含虚拟激发的新型量子路径，该路径诱导阿秒拓扑干涉，将贝里曲率编码进光电子发射延迟，连接阿秒光谱学与半导体拓扑研究。
AI 中文摘要
将阿秒科学与半导体物理相结合，为半导体性质的阿秒控制提供了一个有前景的跨学科平台。在这两个领域中，通过双光子跃迁干涉重建阿秒拍频（RABBIT）以及时间分辨和角分辨光电子能谱（tr-ARPES）一直是探测电子微观动力学的核心实验技术。然而，尽管这两种技术具有许多相似之处，但迄今为止，将这两个领域桥接起来的两种技术的整合仍然缺失。在此，我们基于二阶含时微扰理论开发了一个整合这两种技术的理论框架。在此框架内，我们研究了半导体中的RABBIT光谱，重点关注tr-ARPES的最新标志性成果，即Floquet态和Volkov态之间的量子路径干涉。此外，我们从理论上识别出一种包含虚拟激发的新型量子路径，该路径在半导体RABBIT光谱和tr-ARPES中与Floquet态和Volkov态发生显著干涉。重要的是，我们发现这种虚拟激发通道诱导了与Floquet-Volkov路径的阿秒拓扑干涉，将局部贝里曲率等拓扑量编码到RABBIT边带的时移中，该时移与光电子发射延迟直接相关。我们的发现建立了一个将阿秒光谱学与tr-ARPES连接起来的理论框架，为阿秒科学在半导体中的未来应用铺平了道路。
英文摘要
Combining attosecond science with semiconductor physics provides a promising interdisciplinary platform for the attosecond control of semiconducting properties. In each field, the reconstruction of attosecond beating by interference of two-photon transitions (RABBIT) and the time-resolved and angle-resolved photoemission spectroscopy (tr-ARPES) have been central experimental techniques for probing microscopic dynamics of electrons. However, the integration of the two techniques, bridging the two fields, has been missing so far although they have many technical similarities. Here, we develop a theoretical framework that integrates the two techniques based on the second-order time-dependent perturbation theory. Within this framework, we investigate the RABBIT spectroscopy in semiconductors focusing on the recent hallmark of tr-ARPES, namely quantum path interference between Floquet and Volkov states. Moreover, we theoretically identify a novel quantum path incorporating the virtual excitation, which substantially interferes with the Floquet and Volkov states in both the RABBIT spectroscopy and tr-ARPES of semiconductors. Importantly, we find that such virtual excitation channel induces an attosecond topological interference with the Floquet-Volkov paths, encoding topological quantities such as the local Berry curvature into the time shift of RABBIT sidebands, which is directly related to the photoelectron emission delay. Our findings establish a theoretical framework connecting attosecond spectroscopy to tr-ARPES, paving the way for future applications of attosecond science in semiconductors.
Comments45 pages, 15 figures
