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arXiv · 2507.18019

Occupation-Driven emission asynchronous as a Fundamental Constraint on Solid-State Attosecond Pulses

Qing-Guo Fan·Kang Lai·Wen-hao Liu·Zhi Wang·Lin-Wang Wang·Jun-Wei Luo
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Abstract

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.

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Qing-Guo Fan, Kang Lai, Wen-hao Liu, Zhi Wang, Lin-Wang Wang, Jun-Wei Luo. 2025-07-24. Occupation-Driven emission asynchronous as a Fundamental Constraint on Solid-State Attosecond Pulses. https://arxiv.org/abs/2507.18019

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