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Review of Scientific Instruments : Transferring cold atoms in double magneto-optical trap by a continuouswave transfer laser beam with large red detuning

By Junmin Wang, Jing Wang, Shubin Yan, Tao Geng, and Tiancai Zhang

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Book Id: WPLBN0002169686
Format Type: PDF eBook :
File Size: Serial Publication
Reproduction Date: 31 December 2008

Title: Review of Scientific Instruments : Transferring cold atoms in double magneto-optical trap by a continuouswave transfer laser beam with large red detuning  
Author: Junmin Wang, Jing Wang, Shubin Yan, Tao Geng, and Tiancai Zhang
Volume: Issue : December 2008
Language: English
Subject: Science, Physics, Natural Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Review of Scientific Instruments Collection
Historic
Publication Date:
Publisher: American Institute of Physics

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Jing Wang, Shubin Yan, Tao Geng, And Tiancai Zhan, J. W. (n.d.). Review of Scientific Instruments : Transferring cold atoms in double magneto-optical trap by a continuouswave transfer laser beam with large red detuning. Retrieved from http://www.worldjournal.org/


Description
Description: A novel scheme of transferring cold atoms in a double magneto-optical trap (MOT) system has been experimentally demonstrated. Cold cesium atoms trapped in a vapor-cell MOT are efficiently transferred to an ultrahigh-vacuum (UHV) MOT by a continuous-wave divergent Gaussian transfer laser beam. When large red detuning and moderate intensity are adopted for the transfer laser beam, enhancement of the recapturing of atoms in the UHV MOT is clearly observed. Using the divergent transfer laser beam (diameter of ~1.60 mm in the vapor-cell MOT region) with typical power of ~20.2 mW, up to ~85% of transfer efficiency is obtained when the frequency detuning is set to around −1.2 GHz, and it is not sensitive to small detuning variation. This transfer is much efficient compared with that in the case of continuous-wave near-resonance weak transfer laser beam (typical power of order of ∼ 100 μW and typical frequency detuning of ~−10 MHz) which is normally used in double-MOT experiment. The enhancement is ascribed to the guiding effect on cold atomic flux by transverse dipole potential of the large red-detuned transfer laser beam.

 
 


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