Optimization of a magneto-optic trap using nanofibers

doi:10.1088/1674-1056/28/7/073701

中国物理B ›› 2019, Vol. 28 ›› Issue (7): 73701-073701.doi: 10.1088/1674-1056/28/7/073701

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇下一篇

Optimization of a magneto-optic trap using nanofibers

Xin Wang(王鑫), Li-Jun Song(宋丽军), Chen-Xi Wang(王晨曦), Peng-Fei Zhang(张鹏飞), Gang Li(李刚), Tian-Cai Zhang(张天才)

1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

收稿日期:2019-02-28 修回日期:2019-05-07 出版日期:2019-07-05 发布日期:2019-07-05
通讯作者: Peng-Fei Zhang, Tian-Cai Zhang E-mail:cqedpfzhang@163.com;tczhang@sxu.edu.cn
基金资助:
Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0304502), the National Natural Science Foundation of China (Grant Nos. 11574187, 11634008, 11674203, and 61227902), and the Fund for Shanxi “1331 Project”, China.

Optimization of a magneto-optic trap using nanofibers

Xin Wang(王鑫)¹, Li-Jun Song(宋丽军)¹, Chen-Xi Wang(王晨曦)¹, Peng-Fei Zhang(张鹏飞)^1,2, Gang Li(李刚)^1,2, Tian-Cai Zhang(张天才)^1,2

1 State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

Received:2019-02-28 Revised:2019-05-07 Online:2019-07-05 Published:2019-07-05
Contact: Peng-Fei Zhang, Tian-Cai Zhang E-mail:cqedpfzhang@163.com;tczhang@sxu.edu.cn
Supported by:
Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0304502), the National Natural Science Foundation of China (Grant Nos. 11574187, 11634008, 11674203, and 61227902), and the Fund for Shanxi “1331 Project”, China.

摘要/Abstract

摘要：

We experimentally demonstrate a reliable method based on a nanofiber to optimize the number of cold atoms in a magneto-optical trap (MOT) and to monitor the MOT in real time. The atomic fluorescence is collected by a nanofiber with subwavelength diameter of about 400 nm. The MOT parameters are experimentally adjusted in order to match the maximum number of cold atoms provided by the fluorescence collected by the nanofiber. The maximum number of cold atoms is obtained when the intensities of the cooling and re-pumping beams are about 23.5 mW/cm² and 7.1 mW/cm², respectively; the detuning of the cooling beam is -13.0 MHz, and the axial magnetic gradient is about 9.7 Gauss/cm. We observe a maximum photon counting rate of nearly (4.5±0.1)×10⁵ counts/s. The nanofiber-atom system can provide a powerful and flexible tool for sensitive atom detection and for monitoring atom-matter coupling. It can be widely used from quantum optics to quantum precision measurement.

关键词: nanofiber, magneto-optic trap, optimization, fluorescence, efficient coupling

Abstract:

Key words: nanofiber, magneto-optic trap, optimization, fluorescence, efficient coupling

中图分类号: (Atom, molecule, and ion cooling methods)

37.10.-x

42.81.Qb (Fiber waveguides, couplers, and arrays) 32.50.+d (Fluorescence, phosphorescence (including quenching)) 42.50.-p (Quantum optics)

王鑫, 宋丽军, 王晨曦, 张鹏飞, 李刚, 张天才. Optimization of a magneto-optic trap using nanofibers[J]. 中国物理B, 2019, 28(7): 73701-073701.

Xin Wang(王鑫), Li-Jun Song(宋丽军), Chen-Xi Wang(王晨曦), Peng-Fei Zhang(张鹏飞), Gang Li(李刚), Tian-Cai Zhang(张天才). Optimization of a magneto-optic trap using nanofibers[J]. Chin. Phys. B, 2019, 28(7): 73701-073701.

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Optimization of a magneto-optic trap using nanofibers

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