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Phase-resolved two-dimensional spectroscopy of electronic wave packets by laser-induced XUV free induction decay

S. Beaulieu, E. Bloch, L. Barreau, A. Comby, D. Descamps, R. Géneaux, F. Légaré, S. Petit, and Y. Mairesse
Phys. Rev. A 95, 041401(R) – Published 3 April 2017
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Abstract

We present a time- and phase-resolved, background-free scheme to study the extreme ultraviolet dipole emission of a bound electronic wave packet, without the use of any extreme ultraviolet exciting pulse. Using multiphoton transitions, we populate a superposition of quantum states which coherently emit extreme ultraviolet radiation through free induction decay. This emission is probed and controlled, both in amplitude and phase, by a time-delayed infrared femtosecond pulse. We directly measure the laser-induced dephasing of the emission by using a simple heterodyne detection scheme based on two-source interferometry. This technique provides rich information about the interplay between the laser field and the Coulombic potential on the excited electron dynamics. Its background-free nature enables us to use a large range of gas pressures and to reveal the influence of collisions in the relaxation process.

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  • Received 10 January 2017

DOI:https://doi.org/10.1103/PhysRevA.95.041401

©2017 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

S. Beaulieu1,2, E. Bloch1, L. Barreau3, A. Comby1, D. Descamps1, R. Géneaux3, F. Légaré2, S. Petit1, and Y. Mairesse1

  • 1Université de Bordeaux - CNRS - CEA, CELIA, UMR 5107, F-33405 Talence, France
  • 2ALLS, Institut National de la Recherche Scientifique, Centre EMT, Varennes, Quebec, Canada J3X 1S2
  • 3LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, F-91191 Gif-sur-Yvette, France

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Issue

Vol. 95, Iss. 4 — April 2017

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