https://doi.org/10.1140/epjd/s10053-026-01146-7
Research - Photon
Analytical investigation of coherence time from solid-state HHG
1
School of Physics and Electronics, Qiannan Normal University for Nationalities, 558000, Duyun, Guizhou, China
2
Institute of Atomic and Molecular Physics, Jilin University, Changchun, China
3
School of Physics and Information Technology, Shaanxi Normal University, 710062, Xi’an, Shaanxi, China
a
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b
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Received:
15
November
2025
Accepted:
12
March
2026
Published online:
30
March
2026
Abstract
We present an analytical investigation of the momentum-dependent electronic dephasing time 
in crystalline solids driven by strong infrared laser fields. Our analysis of 
reconstructed from MoS
and ZnO experimental solid-state high-order harmonic generation (HHG) data reveals that strong fields renormalize the scattering matrix elements via dynamical band mixing and phonon-assisted channels in polar semiconductors. Specifically, we show that the strikingly different momentum dependence of in MoS and ZnO arises from a cooperative interplay of dimensionality, orbital texture, and many-body interactions. In the two-dimensional MoS, reduced phase-space scaling and strong orbital mixing amplify angular anisotropies in the scattering processes, producing a highly non-monotonic . In contrast, the three-dimensional phase space of ZnO, together with its smoother orbital character and weaker excitonic corrections, yields a much more uniform and nearly monotonic dephasing profile. These results establish dimensionality and orbital hybridization as key drivers of material-specific, k-resolved dephasing dynamics. Our analysis indicates that reconstructing the momentum-dependent dephasing time from solid-state HHG provides potential access to the measurement of ultrafast scattering dynamics, reveals the underlying orbital and band-geometry structure, enables accurate HHG-based band inversion, and offers material-specific parameters essential for predictive simulations and petahertz optoelectronic applications.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2026
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
