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arXiv 1706.06237physics.atom-phquant-ph
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使用318.6-nm UV laser和室温蒸气室的单光子铯里德伯激发光谱

Single-photon cesium Rydberg excitation spectroscopy using 318.6-nm UV laser and room-temperature vapor cell

Jieying Wang, Jiandong Bai, Jun He, Junmin Wang

摘要:

我们在室温蒸气室中演示了铯原子的单光子里德伯激发光谱。Cs原子直接从6S 1/2基态激发到nP 3/2(n = 70 - 100)Rydberg态,共振态为Cs 6S_(1/2),F = 4 - 6P_(3/2),F' = 5跃迁作为F = 4基态上的部分布居转移到Rydberg态,分析表明所观察到的光谱是Rydberg态的速度选择光谱,并由此研究了激光拉比频率对振幅和线宽的影响。拟合到Cs nP ~(3/2)(n = 70 - 100)态的能量,确定的量子亏损为3.56671(42)。解调后的光谱也可以用作频率参考,以稳定的紫外激光频率到特定的Cs里德堡跃迁。

英文摘要:

We demonstrate a single-photon Rydberg excitation spectroscopy of cesium (Cs) atoms in a room-temperature vapor cell. Cs atoms are excited directly from 6S1/2 ground state to nP3/2 (n = 70 - 100) Rydberg states with a 318.6 nm ultraviolet (UV) laser,and Rydberg excitation spectra are obtained by transmission enhancement of a probe beam resonant to Cs 6S1/2, F = 4 - 6P3/2, F' = 5 transition as partial population on F = 4 ground state are transferred to Rydberg state .Analysis reveals that the observed spectra are velocity-selective spectroscopy of Rydberg state, from which the amplitude and linewidth influenced by lasers'Rabi frequency have been investigated. Fitting to energies of Cs nP3/2 (n = 70 -100) states, the determined quantum defect is 3.56671(42). The demodulated spectra can also be employed as frequency references to stabilize the UV laser frequency to specific Cs Rydberg transition.

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