Cold cesium molecules produced directly in a magneto–optical trap

doi:10.1088/1674-1056/20/12/123702

中国物理B ›› 2011, Vol. 20 ›› Issue (12): 123702-123702.doi: 10.1088/1674-1056/20/12/123702

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Cold cesium molecules produced directly in a magneto–optical trap

张洪山, 姬中华, 元晋鹏, 赵延霆, 马杰, 汪丽蓉, 肖连团, 贾锁堂

State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, College of Physics and Electronic Engineering, Shanxi University, Taiyuan 030006, China

收稿日期:2011-04-12 修回日期:2011-06-14 出版日期:2011-12-15 发布日期:2011-12-15
基金资助:
Project supported by the National Key Fundamental Basic Research Program of China (Grant No. 2006CB921603), the Major Program of National Natural Science Foundation of China (Grant No. 10934004), the National Natural Science Foundation of China (Grant Nos. 60978018, 60808009, 61008012, and 60978001), the New Teacher Fund of the Ministry of Education of China (Grant No. 200801081021), the National Natural Science Foundation of China for Excellent Research Team (Grant No. 60821004), and the Natural Science Foundation of Shanxi Province of China (Grant No. 2009011059-2).

Cold cesium molecules produced directly in a magneto–optical trap

Zhang Hong-Shan(张洪山), Ji Zhong-Hua(姬中华), Yuan Jin-Peng(元晋鹏), Zhao Yan-Ting(赵延霆)^†, Ma Jie(马杰), Wang Li-Rong(汪丽蓉), Xiao Lian-Tuan(肖连团), and Jia Suo-Tang(贾锁堂)

State Key Laboratory of Quantum Optics and Quantum Optics Devices, Laser Spectroscopy Laboratory, College of Physics and Electronic Engineering, Shanxi University, Taiyuan 030006, China

Received:2011-04-12 Revised:2011-06-14 Online:2011-12-15 Published:2011-12-15
Supported by:
Project supported by the National Key Fundamental Basic Research Program of China (Grant No. 2006CB921603), the Major Program of National Natural Science Foundation of China (Grant No. 10934004), the National Natural Science Foundation of China (Grant Nos. 60978018, 60808009, 61008012, and 60978001), the New Teacher Fund of the Ministry of Education of China (Grant No. 200801081021), the National Natural Science Foundation of China for Excellent Research Team (Grant No. 60821004), and the Natural Science Foundation of Shanxi Province of China (Grant No. 2009011059-2).

摘要/Abstract

摘要： We report on the observation of ultracold ground electric-state cesium molecules produced directly in a magneto- optical trap with a good signal-to-noise ratio. These molecules arise from the photoassociation of magneto-optical trap lasers and they are detected by resonantly enhanced multiphoton ionization technology. The production rate of ultracold cesium molecules is up to 4×10⁴ s^-1. We measure the characteristic time of the ground electric-state cesium molecules generated in the experiment and investigate the Cs₂⁺ molecular ion intensity as a function of the trapping laser intensity and the ionization pulse laser energy. We conclude that the production of cold cesium molecules may be enhanced by using appropriate experimental parameters, which is useful for future experiments involving the production and trapping of ultracold ground electric-state molecules.

Abstract: We report on the observation of ultracold ground electric-state cesium molecules produced directly in a magneto- optical trap with a good signal-to-noise ratio. These molecules arise from the photoassociation of magneto-optical trap lasers and they are detected by resonantly enhanced multiphoton ionization technology. The production rate of ultracold cesium molecules is up to 4×10⁴ s^-1. We measure the characteristic time of the ground electric-state cesium molecules generated in the experiment and investigate the Cs₂⁺ molecular ion intensity as a function of the trapping laser intensity and the ionization pulse laser energy. We conclude that the production of cold cesium molecules may be enhanced by using appropriate experimental parameters, which is useful for future experiments involving the production and trapping of ultracold ground electric-state molecules.

Key words: photoassociation, ultracold molecules, multiphoton ionization

中图分类号: (Slowing and cooling of molecules)

37.10.Mn

32.80.Rm (Multiphoton ionization and excitation to highly excited states) 33.20.Xx (Spectra induced by strong-field or attosecond laser irradiation)

张洪山, 姬中华, 元晋鹏, 赵延霆, 马杰, 汪丽蓉, 肖连团, 贾锁堂. Cold cesium molecules produced directly in a magneto–optical trap[J]. 中国物理B, 2011, 20(12): 123702-123702.

Zhang Hong-Shan(张洪山), Ji Zhong-Hua(姬中华), Yuan Jin-Peng(元晋鹏), Zhao Yan-Ting(赵延霆), Ma Jie(马杰), Wang Li-Rong(汪丽蓉), Xiao Lian-Tuan(肖连团), and Jia Suo-Tang(贾锁堂) . Cold cesium molecules produced directly in a magneto–optical trap[J]. Chin. Phys. B, 2011, 20(12): 123702-123702.

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Cold cesium molecules produced directly in a magneto–optical trap

Cold cesium molecules produced directly in a magneto–optical trap

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