Direct absorption imaging of ultracold polar molecules

Details Direct absorption imaging of ultracold polar molecules Direct absorption imaging of ultracold polar molecules

2010-03-12

arxiv.org/abs/1003.2583v1

Phys. Rev. A 81, 061404(R) (2010)

Physics

Condensed Matter

Quantum Gases

4 pages, 4 figures

Scientific paper

We demonstrate a scheme for direct absorption imaging of an ultracold ground-state polar molecular gas near quantum degeneracy. A challenge in imaging molecules is the lack of closed optical cycling transitions. Our technique relies on photon shot-noise limited absorption imaging on a strong bound-bound molecular transition. We present a systematic characterization of this imaging technique. Using this technique combined with time-of-flight (TOF) expansion, we demonstrate the capability to determine momentum and spatial distributions for the molecular gas. We anticipate that this imaging technique will be a powerful tool for studying molecular quantum gases.

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