The nonlinear polaronic response of electrons solvated in liquid 2-propanol is studied by two-dimensional terahertz spectroscopy. Solvated electrons with a concentration of ce≈ 800 μM are generated by femtosecond photoionization of alcohol molecules. Electron relaxation to a localized ground state impulsively excites coherent polaron oscillations with a frequency of 3.9 THz. Off-resonant perturbation of the THz coherence by a pulse centered at 1.5 THz modifies the polaron oscillation phase. This nonlinear change of electron polarizability is reproduced by theoretical calculations.
@article{arxiv.2310.02689,
title = {Nonlinear terahertz polarizability of electrons solvated in a polar liquid},
author = {Matthias Runge and Klaus Reimann and Michael Woerner and Thomas Elsaesser},
journal= {arXiv preprint arXiv:2310.02689},
year = {2023}
}