Anomalous Fano Profiles in External Fields
Atomic Physics
2015-12-16 v2 Quantum Physics
Abstract
We show that external control of Fano resonances in general leads to complex Fano -parameters. Fano line shapes of photo-electron and transient absorption spectra in presence of an infrared control field are investigated. Computed transient absorption spectra are compatible with a recent experiment [C. Ott {\it et al.}, Science 340, 716 (2013)] but suggest a modification of the interpretation proposed there. Control mechanisms for photo-electron spectra are exposed: control pulses applied {\em during} excitation modify the line shapes by momentum boosts of the continuum electrons. Pulses arriving {\em after} excitation generate interference fringes due to infrared two-photon transitions.
Cite
@article{arxiv.1405.4279,
title = {Anomalous Fano Profiles in External Fields},
author = {Alejandro Zielinski and Vinay Pramod Majety and Stefan Nagele and Renate Pazourek and Joachim Burgdörfer and Armin Scrinzi},
journal= {arXiv preprint arXiv:1405.4279},
year = {2015}
}