Extending a release-and-recapture scheme to single atom optical tweezer for effective temperature evaluation

By recording the fluorescence fraction of the cold atoms remaining in the magneto-optical trap （MOT） as a function of the release time, the release-and-recapture （R＆R） method is utilized to evaluate the effective temperature of the cold atomic ensemble. We prepare a single atom in a large-magnetic-g...

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Published inChinese physics B Vol. 20; no. 7; pp. 151 - 157
Main Author 何军 杨保东 张天才 王军民
Format Journal Article
LanguageEnglish
Published 01.07.2011
Subjects
Atomic force microscopy
Cold atoms
Cooling effects
Fluorescence
Nuclear power generation
Optimization
Polarization
Recording
光学镊子
冷原子荧光
发布时间
有效温度
有效积温
磁光阱
磁场梯度
评价
Online AccessGet full text
ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/20/7/073701

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Summary:By recording the fluorescence fraction of the cold atoms remaining in the magneto-optical trap （MOT） as a function of the release time, the release-and-recapture （R＆R） method is utilized to evaluate the effective temperature of the cold atomic ensemble. We prepare a single atom in a large-magnetic-gradient MOT and then transfer the trapped single atom into a 1064-nm microscopic optical tweezer. The energy of the single atom trapped in the tweezer is further reduced by polarization gradient cooling （PGC） and the effective temperature is evaluated by extending the R-R technique to a single atom tweezer. The typical effective temperature of a single atom in the tweezer is improved from about 105 μK to about 17 μK by applying the optimum PGC phase.
Bibliography:single atom, optical tweezer, effective temperature, release-and-recapture technique
By recording the fluorescence fraction of the cold atoms remaining in the magneto-optical trap （MOT） as a function of the release time, the release-and-recapture （R＆R） method is utilized to evaluate the effective temperature of the cold atomic ensemble. We prepare a single atom in a large-magnetic-gradient MOT and then transfer the trapped single atom into a 1064-nm microscopic optical tweezer. The energy of the single atom trapped in the tweezer is further reduced by polarization gradient cooling （PGC） and the effective temperature is evaluated by extending the R-R technique to a single atom tweezer. The typical effective temperature of a single atom in the tweezer is improved from about 105 μK to about 17 μK by applying the optimum PGC phase.
11-5639/O4
He Jun, Yang Bao-Dong, Zhang Tian-Cai, Wang Jun-Min State Key Laboratory of Quantum Optics and Quantum Optics Devices, and Institute of Opto-Electronics Shanxi University, Taiyuan 030006, China
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ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/20/7/073701