Radio Frequency Magneto-Optical Trapping of CaF with High Density

September 14, 2017

Fig. 1(c). The experimental layout* (reprinted by permission from APS ©2017).

In the latest issue of Physical Review Letters, graduate student Loïc Anderegg and other members of John Doyle's group, together with colleagues from JILA and MIT, have reported ithat they have significantly improved the method of magneto-optical trapping of molecules using a very slow cryogenic beam source and either rf modulated or dc magnetic fields. The rf magneto-optical trap (MOT) confines 1.0(3)×105 CaF molecules at a density of 7(3)×106 cm−3, which is an order of magnitude greater than previous molecular MOTs. The researchers believe the achieved density will make it possible to directly load optical tweezers and create optical arrays for quantum simulation.

* See L. Anderegg, B.L. Augenbraun, E. Chae, B. Hemmerling, N.R. Hutzler, A. Ravi, A. Collopy, J. Ye, W. Ketterle, and J.M. Doyle, "Radio Frequency Magneto-Optical Trapping of CaF with High Density," Phys. Rev. Lett. 119, 103201 (2017) DOI: