Open AccessAnalytical theory of attosecond transient absorption spectroscopy of perturbatively dressed systems
Author(s) -
Daria Kolbasova,
Robin Santra
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1412/7/072007
Subject(s) - attosecond , pulse (music) , transient (computer programming) , ultrafast laser spectroscopy , physics , absorption (acoustics) , excitation , ultrashort pulse , spectroscopy , signal (programming language) , electromagnetic pulse , measure (data warehouse) , optics , atomic physics , computational physics , laser , quantum mechanics , computer science , database , detector , programming language , operating system
Synopsis The current work provides an elementary explanation of the signals one can obtain in attosecond transient absorption experiments. We perform a perturbative analysis of the transient absorption signal as a function of the time delay between the excitation pulse and the dressing pulse. We discuss an unusual kind of experiment, where the information is gained from the absorption spectrum of an attosecond XUV pump pulse, and the probe pulse gives a reference time, allowing to measure the time evolution of a system. We illustrate our concepts through numerical calculations for a model atom.