Open AccessSemi-classical approach to compute RABBITT traces in multi-dimensional complex field distributions
Author(s) -
Matteo Lucchini,
André Ludwig,
Lamia Kasmi,
L. Gallmann,
U. Keller
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.008867
Subject(s) - attosecond , physics , optics , field (mathematics) , phase (matter) , pulse (music) , infrared , photon , interference (communication) , quantum optics , ultrashort pulse , quantum mechanics , laser , mathematics , channel (broadcasting) , electrical engineering , detector , pure mathematics , engineering
We present a semi-classical model to calculate RABBITT (Reconstruction of Attosecond Beating By Interference of Two-photon Transitions) traces in the presence of a reference infrared field with a complex two-dimensional (2D) spatial distribution. The evolution of the electron spectra as a function of the pump-probe delay is evaluated starting from the solution of the classical equation of motion and incorporating the quantum phase acquired by the electron during the interaction with the infrared field. The total response to an attosecond pulse train is then evaluated by a coherent sum of the contributions generated by each individual attosecond pulse in the train. The flexibility of this model makes it possible to calculate spectrograms from non-trivial 2D field distributions. After confirming the validity of the model in a simple 1D case, we extend the discussion to describe the probe-induced phase in photo-emission experiments on an ideal metallic surface.