Obtaining Ultra-cold Atoms by Optical Molasses Directly from Vapor

Abstract

Abstract: Usually the magneto-optical trap(MOT)is used to obtain the cold atoms from the vapor. It is reported that experiments for obtaining the ultra-cold cesium atoms by optical molasses directly from the vapor cell without MOT. The lowest temperature achieved for the cesium atomic cloud was 3μK. The relationship between the temperature and the detuning of cooling laser was measured.

Key words: laser cooling, optical molasses, super cold atoms, MOT

摘要： 报告了采用直接从铯蒸汽气室而不用磁光阱实现了光学粘团的方法。用此办法得到了3μΚ的铯的超冷原子团。这是我国目前用激光冷却方法得到的最低温度。具体描述了实验装置和方法，以及测量温度的拟合方法。

关键词: 激光冷却, 光学粘团, 超冷原子, 磁光阱

CLC Number:

HOU Jidong,WANG Xiaohui,CHEN Xuzong,YANG Donghai,WANG Yiqiu. Obtaining Ultra-cold Atoms by Optical Molasses Directly from Vapor[J]. Acta Scientiarum Naturalium Universitatis Pekinensis.

侯继东,王晓辉,陈徐宗,杨东海,王义遒. 直接从气室获得3μΚ超低温铯原子光学粘团[J]. 北京大学学报（自然科学版）.

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Obtaining Ultra-cold Atoms by Optical Molasses Directly from Vapor

直接从气室获得3μΚ超低温铯原子光学粘团

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