High-harmonic spectroscopy: From femtosecond to attosecond molecular dynamics

Abstract

The principles of high-harmonic spectroscopy (HHS) are illustrated using two recent examples from the literature. The method can be applied as a probe to measure the evolution of the electronic structure of a molecule during a chemical reaction on the femtosecond time scale. Alternatively, it can be used as a comprehensive method unifying pump and probe steps into a single laser cycle to measure electronic dynamics on the attosecond time scale. © Schweizerische Chemische Gesellschaft.