Observation of photon recoil effects in single-beam absorption spectroscopy with an ultracold strontium gas
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作者
Hu, Fachao; Tan, Canzhu; Jiang, Yuhai; Weidemueller, Matthias; Zhu, Bing
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刊物名称
CHINESE PHYSICS B
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年、卷、文献号
2022, 31, 1674-1056
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关键词
Hu, Fachao; Tan, Canzhu; Jiang, Yuhai; Weidemueller, Matthias; Zhu, Bing
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摘要
We report on observing photon recoil effects in the absorption of a single monochromatic light at 689 nm through an ultracold Sr-88 gas, where the recoil frequency is comparable to natural linewidth of the narrow-line transition 5s(2 1)S(0)-5s5p P-3(1) in strontium. In the regime of high-saturation, the absorption profile becomes asymmetric due to the photon-recoil shift, which is of the same order as the natural linewidth. The lineshape is described by an extension of the optical Bloch equations including the momentum transfers to atoms during emission and absorption of photons. Our work reveals the photon recoil effects in a simplest single-beam absorption setting, which is of significant relevance to other applications such as saturation spectroscopy, Ramsey interferometry, and absorption imaging.
