期刊
PHYSICAL REVIEW LETTERS
卷 117, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.073002
关键词
-
资金
- CNRS international program
- French Agence National pour la Recherche (Project LOVE) [ANR-14-CE26-0032]
- Brazilian Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Brazilian Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq, Project PVE) [303426/2014-4]
- European Research Executive Agency (Program COSCALI) [PIRSES-GA-2010-268717]
- University Studentship of the University of Strathclyde
- Leverhulme Trust
Superradiance has been extensively studied in the 1970s and 1980s in the regime of superfluorescence, where a large number of atoms are initially excited. Cooperative scattering in the linear-optics regime, or single-photon superradiance,has been investigated much more recently, and superradiant decay has also been predicted, even for a spherical sample of large extent and low density, where the distance between atoms is much larger than the wavelength. Here, we demonstrate this effect experimentally by directly measuring the decay rate of the off-axis fluorescence of a large and dilute cloud of cold rubidium atoms after the sudden switch off of a low-intensity laser driving the atomic transition. We show that, at large detuning, the decay rate increases with the on-resonance optical depth. In contrast to forward scattering, the superradiant decay of off-axis fluorescence is suppressed near resonance due to attenuation and multiple-scattering effects.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据