Citation for published item:wolonyD eter uF nd qregoryD hilip hF nd tiD honghu nd vuD fo nd u¤ oppingerD wi h el F nd ve ueurD gF uth nd fl kleyD g roline vF nd rutsonD teremy wF nd gornishD imon vF @PHIRA 9gre tion of ultr old VU IQQgs mole ules in the rovi r tion l ground st teF9D hysi l review lettersFD IIQ @PSAF pF PSSQHIF Further information on publisher's website:httpXGGdxFdoiForgGIHFIIHQG hys evvettFIIQFPSSQHI Publisher's copyright statement:Reprinted with permission from the American Physical Society: Physical Review Letters 113, 255301 c 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modi ed, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. We report the creation of a sample of over 1000 ultracold 87 Rb 133 Cs molecules in the lowest rovibrational ground state, from an atomic mixture of 87 Rb and 133 Cs, by magnetoassociation on an interspecies Feshbach resonance followed by stimulated Raman adiabatic passage (STIRAP). We measure the binding energy of the RbCs molecule to be hc × 3811.576ð1Þ cm −1 and the jv 00 ¼ 0; J 00 ¼ 0i to jv 00 ¼ 0; J 00 ¼ 2i splitting to be h × 2940.09ð6Þ MHz. Stark spectroscopy of the rovibrational ground state yields an electric dipole moment of 1.225(3)(8) D, where the values in parentheses are the statistical and systematic uncertainties, respectively. We can access a space-fixed dipole moment of 0.355(2)(4) D, which is substantially higher than in previous work.

We report the production of 87 RbCs Feshbach molecules in a crossed-beam dipole trap. A mixture of 87 Rb and 133 Cs is cooled close to quantum degeneracy before an interspecies Feshbach resonance at 197 G is used to associate up to ∼ 5000 molecules with a temperature of ∼ 300 nK. The molecules are confined in the dipole trap with a lifetime of 0.21(1) s, long enough for future experiments exploring optical transfer to the absolute ground state. We have measured the magnetic moment of the Feshbach molecules in a magnetic bias field range between 181 and 185 G to demonstrate the ability to control the character of the molecular state. In addition, we have performed Feshbach spectroscopy in a field range from 0 to 1200 G and located three previously unobserved resonances at high magnetic fields.

A simple, versatile laser system for the creation of ultracold ground state molecules Here we describe how a relatively simple apparatus consisting of a single fixed-length optical cavity can be used to narrow the linewidth of the two different wavelength lasers required for STIRAP simultaneously. The frequency of each of these lasers is referenced to the cavity and is continuously tunable away from the cavity modes through the use of non-resonant electro-optic modulators. Selfheterodyne measurements suggest the laser linewidths are reduced to several 100 Hz. In the context of 87 Rb 133 Cs molecules produced via magnetoassociation on a Feshbach resonance, we demonstrate the performance of the laser system through one-and two-photon molecular spectroscopy. Finally, we demonstrate transfer of the molecules to the rovibrational ground state using STIRAP.

(2016) 'Production of ultracold 87Rb133Cs in the absolute ground state : complete characterisation of the STIRAP transfer. ', ChemPhysChem., 17 (22). pp. 3811-3817. Further information on publisher's website: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractWe present the production of ultracold 87 RbCs molecules in the electronic, rovibrational and hyperfine ground state, using stimulated Raman adiabatic passage to transfer the molecules from a weakly bound Feshbach state. We measure one-way transfer efficiencies of 92(1)% and fully characterise the strengths and linewidths of the transitions used. We model the transfer, including a Monte Carlo simulation of the laser noise, and find this matches well with both the transfer efficiency and our previous measurements of the laser linewidth and frequency drifts.

Reprinted with permission from the American Physical Society: Molony, P.K. and Kumar, A. and Gregory, P.D. and Kliese, R. and Puppe, T. and Le Sueur, C.R. and Aldegunde, J. and Hutson, J.M. and Cornish, S.L. (2016) 'Measurement of the binding energy of ultracold 87Rb133Cs molecules using an oset-free optical frequency comb.', Physical review A., 94 (2). 022507 c 2016 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modied, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. We report the binding energy of 87 Rb 133 Cs molecules in their rovibrational ground state measured using an offset-free optical frequency comb based on difference frequency generation technology. We create molecules in the absolute ground state using stimulated Raman adiabatic passage (STIRAP) with a transfer efficiency of 88%. By measuring the absolute frequencies of our STIRAP lasers, we find the energy-level difference from an initial weakly bound Feshbach state to the rovibrational ground state with a resolution of ∼5 kHz over an energy-level difference of more than 114 THz; this lets us discern the hyperfine splitting of the ground state. Combined with theoretical models of the Feshbach-state binding energies and ground-state hyperfine structure, we determine a zero-field binding energy of h×114 268 135.24(4)(3) MHz. To our knowledge, this is the most accurate determination to date of the dissociation energy of a molecule.