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Luminorefrigeration: vibrational cooling of NaCs.

Authors
  • 1
  • 1 Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA. [email protected]
Type
Published Article
Journal
Optics Express
1094-4087
Publisher
The Optical Society
Publication Date
Volume
20
Issue
14
Pages
16083–16091
Identifiers
DOI: 10.1364/OE.20.016083
PMID: 22772299
Source
Medline
License
Unknown

Abstract

We demonstrate the use of optical pumping of kinetically ultracold NaCs to cool an initial vibrational distribution of electronic ground state molecules X(1)Σ(+)(v ≥ 4) into the vibrational ground state X(1)Σ(+)(v=0). Our approach is based on the use of simple, commercially available multimode diode lasers selected to optically pump population into X(1)Σ(+)(v=0). We investigate the impact of the cooling process on the rotational state distribution of the vibrational ground state, and observe that an initial distribution, J(initial)=0-2 is only moderately affected resulting in J(final)=0-4. This method provides an inexpensive approach to creation of vibrational ground state ultracold polar molecules.

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