MEASUREMENTS OF TEMPERATURE AND SPRING CONSTANT IN A MAGNETOOPTICAL TRAP

被引：76

作者：

WALLACE, CD ^{[1
]}

DINNEEN, TP ^{[1
]}

TAN, KYN ^{[1
]}

KUMARAKRISHNAN, A ^{[1
]}

GOULD, PL ^{[1
]}

JAVANAINEN, J ^{[1
]}

机构：

[1] HELSINKI UNIV TECHNOL,DEPT TECH PHYS,SF-02150 ESPOO 15,FINLAND

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 1994年 / 11卷 / 05期

关键词：

D O I：

10.1364/JOSAB.11.000703

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We have measured the low-density characteristics of a magneto-optical trap for both isotopes of rubidium. Trapped-atom temperatures are measured by the time-of-flight technique and are similar to temperatures in optical molasses. They are below the Doppler limit in most cases and increase linearly with the ratio of laser intensity to laser detuning. A slight difference between the two isotopes is observed. The data agree well with three-dimensional, multistate, semiclassical simulations. Spring constants of the trap are inferred from careful measurements of the size of the trapped-atom cloud. The spring constant is seen to increase with intensity at low intensity, becoming independent of intensity at high intensity. This trend is consistent with sub-Doppler cooling mechanisms.

引用

页码：703 / 711

页数：9

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