title: Luminorefrigeration: vibrational cooling of NaCs.
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.
authors: Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA. amywakim@pas.rochester.edu
authors: A
authors: A
authors: Wakim
authors: P
authors: P
authors: Zabawa
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authors: M
authors: Haruza
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authors: NP
authors: Bigelow