Autler–Townes doublet in single-photon Rydberg spectra of cesium atomic vapor with a 319 nm UV laser
Autler–Townes doublet in single-photon Rydberg spectra of cesium atomic vapor with a 319 nm UV laser
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DOI：
10.1007/s00340-019-7151-x
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发表时间：
2018-06
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影响因子：
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通讯作者：
Jiandong Bai;Jieying Wang;Shuo Liu;Jun He;Junmin Wang
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文献类型：
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作者：
Jiandong Bai;Jieying Wang;Shuo Liu;Jun He;Junmin Wang
我们证明了铯里德伯原子的单光子激发光谱的多普勒自由纯全光探测与室温蒸气室和319 nm的紫外（UV）激光。用窄线宽319 nm紫外激光直接将原子从6S_（1/2）基态激发到71 P_（3/2）里德伯态。里德伯态的检测是通过在V型三能级系统中监测852 nm探测光束的吸收来进行的。在强耦合光场下，我们观察到了Autler-Townes双态，并从实验上研究了耦合强度对谱线间距和线宽的影响，这与基于修饰态理论的预言相一致。我们进一步研究了外加磁场下的里德堡谱。非简并塞曼子能级的存在导致了光谱的展宽和移动。它在磁场传感方面具有潜在的应用价值。
We demonstrate the single-photon excitation spectra of cesium Rydberg atoms by means of a Doppler-free purely all-optical detection with a room-temperature vapor cell and a 319 nm ultra-violet (UV) laser. We excite atoms directly from 6S1/2ground state to 71P3/2Rydberg state with a narrow-linewidth 319 nm UV laser. The detection of Rydberg states is performed by monitoring the absorption of an 852 nm probe beam in a V-type three-level system. With a strong coupling light, we observe the Autler–Townes doublet and investigate experimentally the dependence of the separation and linewidth on the coupling intensity, which is consistent with the prediction based on the dressed state theory. We further investigate the Rydberg spectra with an external magnetic field. The existence of non-degenerate Zeeman sub-levels results in the broadening and shift of the spectra. It has potential application in sensing magnetic field.