Theoretical study of high-order harmonic generation in solutions

Abstract

High-order harmonic generation (HHG) in disordered systems is investigated by numerically solving the time-dependent Schrödinger equation. We reveal the vital role of Anderson localization in this situation. It allows us to develop a new and efficient sampling method for the large disordered system, which could significantly reduce the computation cost. It can be applied to both pure liquids and solutions. The structures and cutoffs of the harmonic spectrum are simulated with different field strengths and statistical parameters in the solution. Compared with HHG in pure liquids, the harmonic signal changes little in dilute solutions. HHG from different solutes and concentrations is simulated to confirm this point. This should be the first theoretical study on HHG in solutions. Our results shed light on the way to investigate the ultrafast processes in the solution.