Light-Induced Structures in Attosecond Transient Absorption Spectroscopy of Molecules

TL;DR

This paper investigates how nuclear dynamics influence light-induced structures in attosecond transient absorption spectra of molecules, using a three-surface theoretical model to identify distinct spectral signatures and discuss experimental observability.

Contribution

It introduces a three-surface model to explain light-induced spectral features and categorizes nuclear dynamics based on their spectral signatures in molecular systems.

Findings

Nuclear dynamics significantly affect light-induced spectral structures.

A three-surface model effectively captures key spectral characteristics.

Different nuclear motion categories produce unique spectral signatures.

Abstract

The nature of light-induced structures in attosecond transient absorption spectroscopy of molecular systems is investigated theoretically. It is shown how nuclear dynamics affect these structures. We find that a theoretical three-surface model captures the main characteristics in the calculated spectra. Based on this model, nuclear dynamics is divided into different categories, each category having unique signatures in the absorption spectra. Finally, we discuss the possibility for experimental observation of light-induced structures in molecules.