Coherent control with shaped femtosecond laser pulses applied to ultracold molecules

Journal Article · Wed Feb 15 04:00:00 EST 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.023414· OSTI ID:20974609

Salzmann, Wenzel; Poschinger, Ulrich; Wester, Roland; Weidemueller, Matthias; Merli, Andrea; Weber, Stefan M; Sauer, Franziska; Plewicki, Mateusz; Weise, Fabian; Esparza, Aldo Mirabal; Woeste, Ludger; Lindinger, Albrecht ^[1]

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1. Physikalisches Institut, Universitaet Freiburg, Hermann Herder Str. 3, D-79104 Freiburg i. Br. (Germany)

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 Rb{sub 2} 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.

• OSTI ID: 20974609
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 73; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
COOLING
DIMERS
DISSOCIATION
EXCITATION
FEEDBACK
FRAGMENTATION
GASES
LASER RADIATION
MAGNETO-OPTICAL EFFECTS
MOLECULES
PHOTOIONIZATION
PHOTON-MOLECULE COLLISIONS
PULSES
RUBIDIUM
TRAPS