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10 June 2024 High-harmonic spectroscopy of low-energy electron-scattering dynamics in liquids
A. Mondal, O. Neufeld, Z. Yin, Z. Nourbakhsh, V. Svoboda, A. Rubio, N. Tancogne-Dejean, H. J. Wörner
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Proceedings Volume 12992, Advances in Ultrafast Condensed Phase Physics IV; 129920C (2024) https://doi.org/10.1117/12.3026006
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
High-harmonic spectroscopy is an all-optical nonlinear technique with inherent attosecond temporal resolution. It has been applied to a variety of systems in the gas phase and solid state. Here we extend its use to liquid samples. By studying high-harmonic generation over a broad range of wavelengths and intensities, we show that the cut-off energy is independent of the wavelength beyond a threshold intensity and that it is a characteristic property of the studied liquid. We explain these observations with a semi-classical model based on electron trajectories that are limited by the electron scattering. This is further confirmed by measurements performed with elliptically polarized light and with ab-initio time-dependent density functional theory calculations. Our results propose high-harmonic spectroscopy as an all-optical approach for determining the effective mean free paths of slow electrons in liquids.
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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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A. Mondal, O. Neufeld, Z. Yin, Z. Nourbakhsh, V. Svoboda, A. Rubio, N. Tancogne-Dejean, and H. J. Wörner "High-harmonic spectroscopy of low-energy electron-scattering dynamics in liquids", Proc. SPIE 12992, Advances in Ultrafast Condensed Phase Physics IV, 129920C (10 June 2024); https://doi.org/10.1117/12.3026006
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KEYWORDS
Liquids
Spectroscopy
Scattering
Water
High harmonic generation
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