Four-wave mixing in ultracold atoms using intermediate Rydberg states

被引：32

作者：

Brekke, E. ^{[1
]}

Day, J. O. ^{[1
]}

Walker, T. G. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA

来源：

PHYSICAL REVIEW A | 2008年 / 78卷 / 06期

基金：

美国国家科学基金会;

关键词：

atom-photon collisions; laser cooling; multiwave mixing; photoexcitation; rubidium; Rydberg states; two-photon processes;

D O I：

10.1103/PhysRevA.78.063830

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Ultracold Rb atoms were used to demonstrate nondegenerate four-wave mixing through a Rydberg state. Continuous 5S-5P-nD two-photon excitation to the Rydberg state was combined with an nD-6P tuned laser in a phase-matched geometry. The angular dependence, spatial profile, and dependence on detuning were investigated, showing good agreement with theory. Under optimum conditions 50% of the radiation was emitted into the phase-matched direction. The directional emission is promising for studying quantum effects in blockaded atom clouds.

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页数：5

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