Λ-enhanced gray molasses in a tetrahedral laser beam geometry

被引：8

作者：

Barker, D. S. ^{[1
]}

Norrgard, E. B. ^{[1
]}

Klimov, N. N. ^{[1
]}

Fedchak, J. A. ^{[1
]}

Scherschligt, J. ^{[1
]}

Eckel, S. ^{[1
]}

机构：

[1] NIST, Sensor Sci Div, Gaithersburg, MD 20899 USA

来源：

OPTICS EXPRESS | 2022年 / 30卷 / 06期

关键词：

ATOMS; EFFICIENT;

D O I：

10.1364/OE.444711

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the observation of sub-Doppler cooling of lithium using an irregular-tetrahedral laser beam arrangement, which is produced by a nanofabricated diffraction grating. We are able to capture 11(2) % of the lithium atoms from a grating magneto-optical trap into A-enhanced D-1 gray molasses. The molasses cools the captured atoms to a radial temperature of 60(9) mu K and an axial temperature of 23(3) mu K. In contrast to results from conventional counterpropagating beam configurations, we do not observe cooling when our optical fields are detuned from Raman resonance. An optical Bloch equation simulation of the cooling dynamics agrees with our data. Our results show that grating magneto-optical traps can serve as a robust source of cold atoms for tweezer-array and atom-chip experiments, even when the atomic species is not amenable to sub-Doppler cooling in bright optical molasses.

引用

页码：9959 / 9970

页数：12

共 62 条

[1] Laser cooling of optically trapped molecules [J].