Formation of ultracold Rb2 molecules in the v′′ = 0 level of the a3Σ+u state via blue-detuned photoassociation to the 13Πg state

Bellos, Michael; Rahmlow, David; Carollo, Ryan; Banerjee, Jayita; Dulieu, Olivier; Gerdes, A.; Eyler, E. E.; Gould, P. L.; Stwalley, William C.

doi:10.1039/c1cp21383k

Cited by 41 publications

(72 citation statements)

References 34 publications

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“…Estimating the detection efficiency e d is difficult, as it is related to the MCP detector efficiency and also the probability that an ion generated by the ionization laser strikes the MCP. [29], consistent with the extremely high R PA observed in trap-loss measurements [16].…”

Section: Assignment Of 4 3  + Vibrational Levelssupporting

confidence: 74%

Formation of ultracold 7Li85Rb molecules in the lowest triplet electronic state by photoassociation and their detection by ionization spectroscopy

Altaf

Dutta

Lorenz

et al. 2015

The Journal of Chemical Physics

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We report the formation of ultracold 7 Li 85 Rb molecules in the a 3 Σ + electronic state by photoassociation (PA) and their detection via resonantly enhanced multiphoton ionization (REMPI). With our dual-species Li and Rb magneto-optical trap (MOT) apparatus, we detect PA resonances with binding energies up to ~62 cm -1 below the 7 Li 2s 2 S 1/2 + 85 Rb 5p 2 P 1/2 asymptote. In addition, we use REMPI spectroscopy to probe the a 3  + state and excited electronic 3 3  and 4 3  + states, and identify a 3  + (v" = 7 -13), 3 3  (v  ' = 0 -10) and 4 3  + (v  ' = 0 -5) vibrational levels. Our line assignments agree well with ab initio calculations. These preliminary spectroscopic studies on previously unobserved electronic states are crucial to discovering transition pathways for transferring ultracold LiRb molecules created via PA to deeply bound rovibrational levels of the electronic ground state.

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Section: Assignment Of 4 3  + Vibrational Levelssupporting

confidence: 74%

Formation of ultracold 7Li85Rb molecules in the lowest triplet electronic state by photoassociation and their detection by ionization spectroscopy

Altaf

Dutta

Lorenz

et al. 2015

The Journal of Chemical Physics

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“…The corresponding SO coupling elements are determined by an ab initio approximation and the diabatization works more or less fully automatic. Though elegant, this method has not been used widely, 22,23 probably because it does not yield an analytic model of the coupled PESs.…”

Section: Introductionmentioning

confidence: 98%

Spin-orbit coupled potential energy surfaces and properties using effective relativistic coupling by asymptotic representation

Ndome

Eisfeld

2012

The Journal of Chemical Physics

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A new method has been reported recently [H. Ndome, R. Welsch, and W. Eisfeld, J. Chem. Phys. 136, 034103 (2012)] that allows the efficient generation of fully coupled potential energy surfaces (PESs) including derivative and spin-orbit (SO) coupling. The method is based on the diabatic asymptotic representation of the molecular fine structure states and an effective relativistic coupling operator and therefore is called effective relativistic coupling by asymptotic representation (ERCAR). The resulting diabatic spin-orbit coupling matrix is constant and the geometry dependence of the coupling between the eigenstates is accounted for by the diabatization. This approach allows to generate an analytical model for the fully coupled PESs without performing any ab initio SO calculations (except perhaps for the atoms) and thus is very efficient. In the present work, we study the performance of this new method for the example of hydrogen iodide as a well-established test case. Details of the diabatization and the accuracy of the results are investigated in comparison to reference ab initio calculations. The energies of the adiabatic fine structure states are reproduced in excellent agreement with reference ab initio data. It is shown that the accuracy of the ERCAR approach mainly depends on the quality of the underlying ab initio data. This is also the case for dissociation and vibrational level energies, which are influenced by the SO coupling. A method is presented how one-electron operators and the corresponding properties can be evaluated in the framework of the ERCAR approach. This allows the computation of dipole and transition moments of the fine structure states in good agreement with ab initio data. The new method is shown to be very promising for the construction of fully coupled PESs for more complex polyatomic systems to be used in quantum dynamics studies.

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“…A disadvantage of these long-range association techniques is that the resulting molecules typically reside in neardissociation vibrational levels of the X or a states, although exceptions [10,[19][20][21] do exist. These high vibrational levels are problematic for two reasons: (i) they are not stable against vibrational quenching (inelastic and reactive collisions with atoms or other molecules) and (ii) the electric dipole moments of heteronuclear molecules, which are important for many of the applications, are vanishingly small in these barely bound levels.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic prescription for optimal stimulated Raman transfer of ultracold heteronuclear molecules to the lowest rovibronic level

et al. 2011

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We show that the multiplicative product of a molecular-beam excitation spectrum and an ultracold-molecule excitation spectrum, with a frequency offset appropriate to the initial ultracold-molecule level, provides the relative rate of stimulated Raman transfer (SRT) from a given high rovibrational level to the lowest rovibronic level, i.e., the v = 0,J = 0 level of the ground electronic state for photoassociated (and magnetoassociated) ultracold molecules. This product spectrum clearly indicates the optimal pathways for SRT, even when the two component spectra are completely unassigned. We illustrate this specifically for the case of KRb.

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Formation of ultracold Rb2 molecules in the v′′ = 0 level of the a3Σ+u state via blue-detuned photoassociation to the 13Πg state

Cited by 41 publications

References 34 publications

Formation of ultracold 7Li85Rb molecules in the lowest triplet electronic state by photoassociation and their detection by ionization spectroscopy

Formation of ultracold 7Li85Rb molecules in the lowest triplet electronic state by photoassociation and their detection by ionization spectroscopy

Spin-orbit coupled potential energy surfaces and properties using effective relativistic coupling by asymptotic representation

Spectroscopic prescription for optimal stimulated Raman transfer of ultracold heteronuclear molecules to the lowest rovibronic level

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