Laser cooling of a diatomic molecule

E. S. Shuman (), J. F. Barry and D. DeMille
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E. S. Shuman: Yale University, PO Box 208120, New Haven, Connecticut 06520, USA
J. F. Barry: Yale University, PO Box 208120, New Haven, Connecticut 06520, USA
D. DeMille: Yale University, PO Box 208120, New Haven, Connecticut 06520, USA

Nature, 2010, vol. 467, issue 7317, 820-823

Abstract: Laser cooling goes molecular The development of Doppler laser cooling techniques allowed unprecedented access to ultracold temperatures of less 1 millikelvin. The motion of particles effectively ceases at such temperatures, enabling physical phenomena to be studied and controlled in extraordinary detail. Although laser cooling of atoms was demonstrated about 30 years ago, these techniques had not previously been extended to molecules. Ultracold molecules may prove even more interesting than ultracold atoms, because their greater internal complexity can potentially be exploited to investigate and manipulate a wide variety of physical phenomena, ranging from quantum information processing to chemical reactions and particle physics. Currently the only technique for producing ultracold molecules is by binding together ultracold alkali atoms to produce bi-alkali molecules. A team from Yale University now presents an experimental demonstration of laser cooling of a diatomic molecule — the polar molecule strontium monofluoride (SrF). With further refinement, the technique should enable the production of large samples of molecules at ultracold temperatures for species that are chemically distinct from bi-alkalis.

Date: 2010
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DOI: 10.1038/nature09443

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