3-DIMENSIONAL LASER COOLING OF HELIUM BEYOND THE SINGLE-PHOTON RECOIL LIMIT

被引：115

作者：

LAWALL, J ^{[1
]}

KULIN, S ^{[1
]}

SAUBAMEA, B ^{[1
]}

BIGELOW, N ^{[1
]}

LEDUC, M ^{[1
]}

COHENTANNOUDJI, C ^{[1
]}

机构：

[1] ECOLE NORMALE SUPER,LAB KASTLER BROSSEL,F-75231 PARIS 05,FRANCE

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 75卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.75.4194

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first observation of subrecoil laser cooling in three dimensions, where we use the method of velocity-selective coherent population trapping. We have cooled a cloud of trapped metastable helium atoms to 180 nK, 22 times below the single-photon recoil temperature, with an enhancement in the momentum-space density of 16. We find that the efficiency with which the velocity-selective trap is populated can be augmented by Sisyphus-type frictional forces, while the cooling process is accompanied by the diffusion of atoms to states of very high velocity.

引用

页码：4194 / 4197

页数：4

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