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arXiv quant-ph/0610213quant-ph
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环形腔中超辐射瑞利散射

Superradiant Rayleigh scattering in a ring cavity

S. Slama, S. Bux, G. Krenz, C. Zimmermann, Ph. W. Courteille

摘要:

光与原子气体的集体相互作用可以引起超辐射不稳定性。实验研究了在激光驱动的高精细度环形腔中,填充超冷热原子或凝聚原子的反向光场的突然建立。虽然来自原子云的超辐射瑞利散射通常仅在非常低的温度(即远低于$1 μ$ K)下观察到,但是环形腔的存在增强了协同性,并且允许与热达几个$10 μ$ K的热云的超辐射。在不同的温度和协同性参数的超辐射特性,使我们能够将其链接到集体原子反冲激光。

英文摘要:

Collective interaction of light with an atomic gas can give rise to superradiant instabilities. We experimentally study the sudden build-up of a reverse light field in a laser-driven high-finesse ring cavity filled with ultracold thermal or condensed atoms. While superradiant Rayleigh scattering from atomic clouds is normally only observed at very low temperatures (i.e. well below $1 μ$K), the presence of the ring cavity enhances cooperativity and allows for superradiance with thermal clouds as hot as several $10 μ$K. A characterization of the superradiance at various temperatures and cooperativity parameters allows us to link it to the collective atomic recoil laser.

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