2-DIMENSIONAL SUBRECOIL LASER COOLING

被引：108

作者：

LAWALL, J ^{[1
]}

BARDOU, F ^{[1
]}

SAUBAMEA, B ^{[1
]}

SHIMIZU, K ^{[1
]}

LEDUC, M ^{[1
]}

ASPECT, A ^{[1
]}

COHENTANNOUDJI, C ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.73.1915

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 two dimensions by velocity selective coherent population trapping. We have compressed the momentum distribution of a cloud of trapped metastable helium atoms along two orthogonal axes to deltap = HBARk/4, where HBARk is the photon momentum. The corresponding temperature, 16 times below the single-photon recoil temperature, is 250 nK. Atoms are pumped into a nonabsorbing state exhibiting four well-resolved momentum peaks with subrecoil widths. The momentum space density in the peaks is significantly greater than that in the uncooled distribution.

引用

页码：1915 / 1918

页数：4