Carrier-envelope-phase control of asymmetries in the multiphoton ionization of xenon atoms by ultrashort bichromatic fields

S. Kerbstadt, D. Pengel, L. Englert, T. Bayer, and M. Wollenhaupt
Phys. Rev. A 97, 063402 – Published 4 June 2018

Abstract

We report on bichromatic multiphoton ionization of xenon atoms (Xe) to demonstrate carrier-envelope-phase (CEP) control of lateral asymmetries in the photoelectron momentum distribution. In the experiments, we employ a 4f polarization pulse shaper to sculpture bichromatic fields with commensurable center frequencies ω1:ω2=7:8 from an over-octave-spanning CEP-stable white light supercontinuum by spectral amplitude and phase modulation. The bichromatic fields are spectrally tailored to induce controlled interferences of 7- vs 8-photon quantum pathways in the 5P3/2 ionization continuum of Xe. The CEP sensitivity of the asymmetric final-state wave function arises from coherent superposition of continuum states with opposite parity. Our results demonstrate that shaper-generated bichromatic fields with tailored center frequency ratio are a suitable tool to localize CEP-sensitive asymmetries in a specific photoelectron kinetic-energy window.

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  • Received 18 April 2018

DOI:https://doi.org/10.1103/PhysRevA.97.063402

©2018 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

S. Kerbstadt, D. Pengel, L. Englert, T. Bayer, and M. Wollenhaupt*

  • Carl von Ossietzky Universität Oldenburg, Institut für Physik, Carl-von-Ossietzky-Straße 9-11, D-26129 Oldenburg Germany

  • *Corresponding author: matthias.wollenhaupt@uni-oldenburg.de

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Issue

Vol. 97, Iss. 6 — June 2018

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