2025/07/24 by Q. Fan, Qing-Guo Fan, Kang Lai +13
Chemistry · Physics and Astronomy · #Laser-Matter Interactions and Applications #Mass Spectrometry Techniques and Applications #Spectroscopy and Quantum Chemical Studies #physics.atom-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.2507.18019
34 pages, 6 figures
arxiv created 2026/08/02 · arxiv updated 2026/08/04
A newly analytic occupation-resolved theory capturing the temporal structure of attosecond pulses (APs) is derived. We validate it with real-time time-dependent density functional theory and show remarkable temporal confinement of APs with laser intensity in solid state. Using a simplified field-driven electron excitation together with a generalized pre-acceleration picture, the interband emission timing demonstrate intrinsically temporal mismatched with field-synchronous intraband radiation, leading to a nonmonotonic dependence of attosecond pulse width on laser intensity. Our findings not only shed light on the microscopic mechanisms behind solid-state high harmonic generation (HHG), but also establish the fundamental time-domain constraint on solid-state APs independent of material damage thresholds.