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Christensen L, Nielsen JH, Brandt CB, et al. Dynamic stark control of torsional motion by a pair of laser pulses. Phys Rev Lett. 2014;113(7):073005doi: 10.1103/PhysRevLett.113.073005.
Christensen, L., Nielsen, J. H., Brandt, C. B., Madsen, C. B., Madsen, L. B., Slater, C. S., Lauer, A., Brouard, M., Johansson, M. P., Shepperson, B., & Stapelfeldt, H. (2014). Dynamic stark control of torsional motion by a pair of laser pulses. Physical review letters, 113(7), 073005. https://doi.org/10.1103/PhysRevLett.113.073005
Christensen, Lauge, et al. "Dynamic stark control of torsional motion by a pair of laser pulses." Physical review letters vol. 113,7 (2014): 073005. doi: https://doi.org/10.1103/PhysRevLett.113.073005
Christensen L, Nielsen JH, Brandt CB, Madsen CB, Madsen LB, Slater CS, Lauer A, Brouard M, Johansson MP, Shepperson B, Stapelfeldt H. Dynamic stark control of torsional motion by a pair of laser pulses. Phys Rev Lett. 2014 Aug 15;113(7):073005. doi: 10.1103/PhysRevLett.113.073005. Epub 2014 Aug 12. PMID: 25170706.
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Phys Rev Lett. 2014 Aug 15;113(7):073005. doi: 10.1103/PhysRevLett.113.073005. Epub 2014 Aug 12.

Dynamic stark control of torsional motion by a pair of laser pulses.

Physical review letters

Lauge Christensen, Jens H Nielsen, Christian B Brandt, Christian B Madsen, Lars Bojer Madsen, Craig S Slater, Alexandra Lauer, Mark Brouard, Mikael P Johansson, Benjamin Shepperson, Henrik Stapelfeldt

Affiliations

  1. Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark.
  2. Department of Chemistry, University of Oxford, the Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ, United Kingdom.
  3. Department of Chemistry, Laboratory for Instruction in Swedish, University of Helsinki, A.I. Virtanens Plats 1, P.O. Box 55, FI-00014 Helsinki, Finland.
  4. Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark.

PMID: 25170706 DOI: 10.1103/PhysRevLett.113.073005

Abstract

The torsional motion of a molecule composed of two substituted benzene rings, linked by a single bond, is coherently controlled by a pair of strong (3×10^{13}  W cm^{-2}), nonresonant (800 nm) 200-fs-long laser pulses-both linearly polarized perpendicular to the single-bond axis. If the second pulse is sent at the time when the two benzene rings rotate toward (away from) each other the amplitude of the torsion is strongly enhanced (reduced). The torsional motion persists for more than 150 ps corresponding to approximately 120 torsional oscillations. Our calculations show that the key to control is the strong transient modification of the natural torsional potential by the laser-induced dynamic Stark effect.

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