| ATOMIC AND MOLECULAR PHYSICS |
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Long-Lifetime Optical Trapping of a $^{40}$Ca$^{+}$ Ion |
| Zheng Chen1,2,3†, Miao Wang1,2†, Baolin Zhang1,2, Huaqing Zhang1,2, Zixiao Ma1,2,3, Ruming Hu1,2,3, Yao Huang1,2*, Kelin Gao1,2, and Hua Guan1,2,4 |
1State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China
2Key Laboratory of Atomic Frequency Standards, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China
3University of Chinese Academy of Sciences, Beijing 100049, China
4Wuhan Institute of Quantum Technology, Wuhan 430206, China
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Zheng Chen, Miao Wang, Baolin Zhang et al 2024 Chin. Phys. Lett. 41 113701 |
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Abstract We have experimentally achieved the all-optical trapping of a $^{40}$Ca$^{+}$ ion. An optical dipole trap was established using a high-power, far-detuned, tightly focused laser with a wavelength of 532 nm. The single $^{40}$Ca$^{+}$ ion was trapped without any RF fields and demonstrated a long lifetime of over 3 s. In this experiment, we implemented several measures to improve the optical trapping probability, including focusing the dipole beam waist near the diffraction limit, precisely compensating for stray electric fields, and mitigating electron shelving in metastable states. The optical trapping of a $^{40}$Ca$^{+}$ ion eliminates the influence of micromotion induced by RF fields, potentially paving the way for development of all-optical trapping ion optical clocks.
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Received: 11 August 2024
Published: 11 November 2024
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