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Journal Article

Two-State Wave Packet for Strong Field-Free Molecular Orientation


Müller,  Nele L. M.
International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science, DESY, Notkestrasse 85, 22607 Hamburg, Germany;

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Trippel, S., Mullins, T., Müller, N. L. M., Kienitz, J. S., González-Férez, R., & Küpper, J. (2015). Two-State Wave Packet for Strong Field-Free Molecular Orientation. Physical Review Letters, 114(10): 103003. doi:10.1103/PhysRevLett.114.103003.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002A-57E7-9
We demonstrate strong laser-field-free orientation of absolute-ground-state carbonyl sulfide molecules. The molecules are oriented by the combination of a 485-ps-long nonresonant laser pulse and a weak static electric field. The edges of the laser pulse create a coherent superposition of two rotational states resulting in revivals of strong transient molecular orientation after the laser pulse. The experimentally attained degree of orientation <cos θ> ≈ 0.6 corresponds to the theoretical maximum for mixing of the two states. Switching off the dc field would provide the same orientation completely field free.