Anomalous Fano Profiles in External Fields

Alejandro Zielinski, Vinay Pramod Majety, Stefan Nagele, Renate Pazourek, Joachim Burgdörfer, and Armin Scrinzi

Phys. Rev. Lett. 115, 243001 – Published 10 December 2015

Abstract

We show that the external control of Fano resonances in general leads to complex Fano $q$ parameters. Fano line shapes of photoelectron and transient absorption spectra in the presence of an infrared control field are investigated. Computed transient absorption spectra are compared with a model proposed for a recent experiment [C. Ott et al., Science 340, 716 (2013)]. Control mechanisms for photoelectron spectra are exposed: control pulses applied during excitation modify the line shapes by momentum boosts of the continuum electrons. Pulses arriving after excitation generate interference fringes due to infrared two-photon transitions.

Received 30 June 2015

DOI:https://doi.org/10.1103/PhysRevLett.115.243001

Authors & Affiliations

Alejandro Zielinski¹, Vinay Pramod Majety¹, Stefan Nagele², Renate Pazourek^2,3, Joachim Burgdörfer², and Armin Scrinzi^1,*

¹Physics Department, Ludwig Maximilians Universität, D-80333 Munich, Germany
²Institute for Theoretical Physics, Vienna University of Technology, 1040 Vienna, Austria
³Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA

^*armin.scrinzi@lmu.de

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Issue

Vol. 115, Iss. 24 — 11 December 2015

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