Attosecond electron spectroscopy using a novel interferometric pump-probe technique
Abstract
We present an interferometric pump-probe technique for the characterization of attosecond electron wave packets (WPs) that uses a free WP as a reference to measure a bound WP. We demonstrate our method by exciting helium atoms using an attosecond pulse with a bandwidth centered near the ionization threshold, thus creating both a bound and a free WP simultaneously. After a variable delay, the bound WP is ionized by a few-cycle infrared laser precisely synchronized to the original attosecond pulse. By measuring the delay-dependent photoelectron spectrum we obtain an interferogram that contains both quantum beats as well as multi-path interference. Analysis of the interferogram allows us to determine the bound WP components with a spectral resolution much better than the inverse of the attosecond pulse duration.
Cite
@article{arxiv.1001.1085,
title = {Attosecond electron spectroscopy using a novel interferometric pump-probe technique},
author = {J. Mauritsson and T. Remetter and M. Swoboda and K. Klunder and A. L'Huillier and K. J. Schafer and O. Ghafur and F. Kelkensberg and W. Siu and P. Johnsson and M. J. J. Vrakking and I. Znakovskaya and T. Uphues and S. Zherebtsov and M. F. Kling and F. Lepine and E. Benedetti and F. Ferrari and G. Sansone and M. Nisoli},
journal= {arXiv preprint arXiv:1001.1085},
year = {2015}
}
Comments
5 pages, 4 figures