| ATOMIC AND MOLECULAR PHYSICS |
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Electromagnetically Induced Transparency in a Cold Gas with Strong Atomic Interactions |
| Yue-Chun Jiao1,2, Xiao-Xuan Han1,2, Zhi-Wei Yang1,2, Jian-Ming Zhao1,2**, Suo-Tang Jia1,2 |
1State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006
2Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006
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| Cite this article: |
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Yue-Chun Jiao, Xiao-Xuan Han, Zhi-Wei Yang et al 2016 Chin. Phys. Lett. 33 123201 |
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Abstract Electromagnetically induced transparency (EIT) is investigated in a system of cold, interacting cesium Rydberg atoms. The utilized cesium levels $6S_{1/2}$, $6P_{3/2}$ and $nD_{5/2}$ constitute a cascade three-level system, in which a coupling laser drives the Rydberg transition, and a probe laser detects the EIT signal on the $6S_{1/2}$ to $6P_{3/2}$ transition. Rydberg EIT spectra are found to depend on the strong interaction between the Rydberg atoms. Diminished EIT transparency is obtained when the Rabi frequency of the probe laser is increased, whereas the corresponding linewidth remains unchanged. To model the system with a three-level Lindblad equation, we introduce a Rydberg-level dephasing rate $\gamma_{3}=\kappa \times (\rho_{33}/{\it \Omega}_{\rm p})^2$, with a value $\kappa$ that depends on the ground-state atom density and the Rydberg level. The simulation results are largely consistent with the measurements. The experiments, in which the principal quantum number is varied between 30 and 43, demonstrate that the EIT reduction observed at large ${\it \Omega}_{\rm p}$ is due to the strong interactions between the Rydberg atoms.
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Received: 13 September 2016
Published: 29 December 2016
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| PACS: |
32.80.Ee
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(Rydberg states)
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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42.50.Nn
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(Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)
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| Fund: Supported by the National Basic Research Program of China under Grant No 2012CB921603, Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China under Grant No IRT13076, the State Key Program of the National Natural Science of China under Grant No 11434007, the National Natural Science of China under Grant Nos 11274209, 61475090, 60378039 and 61378013, and Shanxi Scholarship Council of China (2014-009). |
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