Two-stage magneto-optical trapping and narrow-line cooling of 6Li atoms to high phase-space density

被引：22

作者：

Sebastian, J. ^{[1
]}

Gross, Ch. ^{[1
]}

Li, Ke ^{[1
]}

Gan, H. C. J. ^{[1
]}

Li, Wenhui ^{[1
,2
]}

Dieckmann, K. ^{[1
,2
]}

机构：

[1] Ctr Quantum Technol, Singapore 117543, Singapore

[2] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

来源：

PHYSICAL REVIEW A | 2014年 / 90卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

Lithium;

D O I：

10.1103/PhysRevA.90.033417

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report an experimental study of peak and phase-space density of a two-stage magneto-optical trap (MOT) of Li-6 atoms, which exploits the narrower 2S(1/2) -> 3P(3/2) ultraviolet (UV) transition at 323 nm following trapping and cooling on the more common D2 transition at 671 nm. The UV MOT is loaded from a red MOT and is compressed to give a high phase-space density up to 3 x 10(-4). Temperatures as low as 33 mu K are achieved on the UV transition. We study the density limiting factors and in particular find a value for the light-assisted collisional loss coefficient of 1.3 +/- 0.4 x 10(-10) cm(3)/s for low repumping intensity.

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页数：4

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