Tracking Hole Migration Dynamics with X-Ray Attosecond Transient Absorption
Abstract
The major goal of this project was to use attosecond transient absorption to investigate the dynamics of photoexcited molecules with unprecedented temporal resolution. In these experiments, a molecule is excited by a few femtosecond laser pulse, and the resulting dynamics are probed by transient absorption of a broadband attosecond pulse that has sufficient energy to excite core-to-valence transitions on selected atoms. By their nature, these transitions are highly element-specific, enabling one to probe how the electronic structure around a particular atom in a molecule evolves subsequent to photoexcitation. Experiments carried out in the energy range of 40-75 eV probe core-to-valence transitions on halogen atoms, while a different experimental configuration generates higher energy photons ranging from 150-350 eV, enabling excitation of these transitions on sulfur and carbon atoms.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 16, 2022
- Accession Number
- AD1221494
Entities
People
- Daniel Neumark
Organizations
- University of California, Berkeley