Towards a theory of attosecond transient recorder
Abstract
Laser assisted photoemission by a chirped subfemtosecond extreme ultraviolet (XUV) pulse is considered within an exactly solvable quantum-mechanical model. Special emphasis is given to the energy dependence of photoexcitation cross-section. The streaked spectra are analyzed within the classical picture of initial time-momentum distribution r_ini(p,t) of photoelectrons mapped to the final energy scale. The actual time-momentum distribution in the absence of the probe laser field is shown to be a poor choice for r_ini, and a more adequate ansatz is suggested. The semiclassical theory offers a simple practically useful approximation for streaked spectra. Its limitations for sufficiently long chirped XUV pulses are established.
Keywords
Cite
@article{arxiv.0907.5384,
title = {Towards a theory of attosecond transient recorder},
author = {E. E. Krasovskii and M. Bonitz},
journal= {arXiv preprint arXiv:0907.5384},
year = {2015}
}
Comments
9 pages 8 figures