Tracking ultrafast solid-state dynamics using high harmonic spectroscopy
Abstract
We establish time-resolved high harmonic generation (tr-HHG) as a powerful spectroscopy for photoinduced dynamics in strongly correlated materials through a detailed investigation of the insulator-to-metal transitions in vanadium dioxide. We benchmark our technique by comparing our measurements to established momentum-resolved ultrafast electron diffraction, and theoretical density functional calculations. Tr-HHG allows distinguishing of individual dynamic channels, including a transition to a thermodynamically hidden phase. In addition, the HHG yield is shown to be modulated at a frequency characteristic of a coherent phonon in the equilibrium monoclinic phase over a wide range of excitation fluences. These results demonstrate that tr-HHG is capable of tracking complex dynamics in solids through its sensitivity to the band structure.
Cite
@article{arxiv.2003.10430,
title = {Tracking ultrafast solid-state dynamics using high harmonic spectroscopy},
author = {Mina R. Bionta and Elissa Haddad and Adrien Leblanc and Vincent Gruson and Philippe Lassonde and Heide Ibrahim and Jérémie Chaillou and Nicolas Émond and Martin R. Otto and Bradley J. Siwick and Mohamed Chaker and François Légaré},
journal= {arXiv preprint arXiv:2003.10430},
year = {2021}
}
Comments
20 pages and 4 figures main text, 8 pages and 4 figures supplementary information