Coherent control with shaped femtosecond laser pulses applied to ultracold molecules

Wenzel Salzmann, Ulrich Poschinger, Roland Wester, Matthias Weidemüller, Andrea Merli, Stefan M. Weber, Franziska Sauer, Mateusz Plewicki, Fabian Weise, Aldo Mirabal Esparza, Ludger Wöste, and Albrecht Lindinger
Phys. Rev. A 73, 023414 – Published 14 February 2006

Abstract

We report on coherent control of excitation processes of translationally ultracold rubidium dimers in a magneto-optical trap by using shaped femtosecond laser pulses. Evolution strategies are applied in a feedback loop in order to optimize the photoexcitation of the Rb2 molecules, which subsequently undergo ionization or fragmentation. A superior performance of the resulting pulses compared to unshaped pulses of the same pulse energy is obtained by distributing the energy among specific spectral components. The demonstration of coherent control to ultracold ensembles opens a path to actively influence fundamental photoinduced processes in molecular quantum gases.

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  • Received 7 September 2005

DOI:https://doi.org/10.1103/PhysRevA.73.023414

©2006 American Physical Society

Authors & Affiliations

Wenzel Salzmann, Ulrich Poschinger, Roland Wester, and Matthias Weidemüller*

  • Physikalisches Institut, Universität Freiburg, Hermann Herder Str. 3, D-79104 Freiburg i. Br., Germany

Andrea Merli, Stefan M. Weber, Franziska Sauer, Mateusz Plewicki, Fabian Weise, Aldo Mirabal Esparza, Ludger Wöste, and Albrecht Lindinger

  • Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany

  • *Corresponding author. Email address: m.weidemueller@physik.uni-freiburg.de
  • Corresponding author. Email address: lindin@physik.fu-berlin.de

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Issue

Vol. 73, Iss. 2 — February 2006

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