Quantum state selection, alignment, and orientation of large molecules using 
static electric and laser fi elds

Filsinger, Frank; Küpper, Jochen; Meijer, Gerard; Holmegaard, Lotte; Nielsen, Jens H.; Nevo, Iftach; Hansen, Jonas L.; Stapelfeldt, Henrik

doi:10.1063/1.3194287

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Journal Article

Quantum state selection, alignment, and orientation of large molecules using static electric and laser fi elds

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Filsinger, Frank
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Küpper, Jochen
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Meijer, Gerard
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Filsinger, F., Küpper, J., Meijer, G., Holmegaard, L., Nielsen, J. H., Nevo, I., et al. (2009). Quantum state selection, alignment, and orientation of large molecules using static electric and laser fi elds. Journal of Chemical Physics, 131(6), 064309-1-064309-13. doi:10.1063/1.3194287.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-F866-4

Abstract

Supersonic beams of polar molecules are deﬂected using inhomogeneous electric ﬁelds. The quantum- state-selectivity of the deﬂection is used to spatially separate molecules according to their quantum state. A detailed analysis of the deﬂection and the obtained quantum-state selection is presented. The rotational temperatures of the molecular beams are determined from the spatial beam proﬁles and are all approximately 1 K. Unprecedented degrees of laser-induced alignment (⟨cos² θ_2D⟩=0.972) and orientation of iodobenzene molecules are demonstrated when the state-selected samples are used. Such state-selected and oriented molecules provide unique possibilities for many novel experiments in chemistry and physics.