3-DIMENSIONAL SPATIAL DIFFUSION IN OPTICAL MOLASSES

被引：71

作者：

HODAPP, TW ^{[1
]}

GERZ, C ^{[1
]}

FURTLEHNER, C ^{[1
]}

WESTBROOK, CI ^{[1
]}

PHILLIPS, WD ^{[1
]}

DALIBARD, J ^{[1
]}

机构：

[1] ECOLE NORMALE SUPER,DEPT PHYS,KASTLER BROSSEL LAB,F-75005 PARIS,FRANCE

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 1995年 / 60卷 / 2-3期

关键词：

D O I：

10.1007/BF01135855

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have studied the expansion of a small cloud of Rb-85 atoms in three-dimensional optical molasses (lin perpendicular to lin and sigma(+) - sigma(-) configurations) and observed diffusive motion. We determined the spatial-diffusion coefficients for various laser intensities and detunings, and compared them (in the case of lin perpendicular to lin molasses) to values calculated from friction and momentum-diffusion coefficients of a one-dimensional (1D) theory of laser cooling. The predicted variations of the spatial-diffusion coefficient with laser intensity and detuning are in good qualitative agreement with the experimental data. We found that the minimal value observed experimentally, approximate to 6 x 10(-4) cm(2)/s, lies within a factor of 3 of the 1D theoretical minimum, approximate to 26 ($) over bar h/M, where M is the atomic mass.

引用

页码：135 / 143

页数：9

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