| ATOMIC AND MOLECULAR PHYSICS |
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Transition Dipole Moment Measurements of Ultracold Photoassociated $^{85}$Rb$^{133}$Cs Molecules by Depletion Spectroscopy |
| Juan-Juan Cao1,2, Ting Gong1,2, Zhong-Hao Li1,2, Zhong-Hua Ji1,2**, Yan-Ting Zhao1,2, Lian-Tuan Xiao1,2, Suo-Tang Jia1,2 |
1State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006
2Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006
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| Cite this article: |
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Juan-Juan Cao, Ting Gong, Zhong-Hao Li et al 2018 Chin. Phys. Lett. 35 103301 |
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Abstract The transition dipole moments (TDMs) of ultracold $^{85}$Rb$^{133}$Cs molecules between the lowest vibrational ground level, $X^{1}{\it \Sigma}^{+}$ ($v=0$, $J=1$), and the two excited rovibrational levels, $2^{3}{\it \Pi}_{0^{+}}$ ($v'=10$, $J'=2$) and $2^{1}{\it \Pi}_{1}$ ($v'=22$, $J'=2$), are measured using depletion spectroscopy. The ground-state $^{85}$Rb$^{133}$Cs molecules are formed from cold mixed component atoms via the $2^{3}{\it \Pi}_{0^{-}}$ ($v=11$, $J=0$) short-range level, then detected by time-of-flight mass spectrum. A home-made external-cavity diode laser is used as the depletion laser to couple the ground level and the two excited levels. Based on the depletion spectroscopy, the corresponding TDMs are then derived to be 3.5(2)$\times$$10^{-3}$$ea_{0}$ and 1.6(1)$\times$$10^{-2}$$ea_{0}$, respectively, where $ea_{0}$ represents the atomic unit of electric dipole moment. The enhance of TDM with nearly a factor of 5 for the $2^{1}{\it \Pi}_{1}$ ($v'=22$, $J'=2$) excited level means that it has stronger coupling with the ground level. It is meaningful to find more levels with much more strong coupling strength by the represented depletion spectroscopy to realize direct stimulated Raman adiabatic passage transfer from scattering atomic states to deeply molecular states.
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Received: 06 July 2018
Published: 15 September 2018
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| PACS: |
33.80.-b
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(Photon interactions with molecules)
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32.70.Cs
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(Oscillator strengths, lifetimes, transition moments)
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32.80.-t
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(Photoionization and excitation)
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| Fund: Supported by the National Key Research and Development Program of China under Grant No 2017YFA0304203, the National Natural Science Foundation of China under Grant Nos 61675120 and 11434007, the National Natural Science Foundation of China for Excellent Research Team under Grant No 61121064, the Shanxi Scholarship Council of China, the 1331KSC, the PCSIRT under Grant No IRT13076, and the Applied Basic Research Project of Shanxi Province under Grant No 201601D202008. |
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