Dephasing of ultracold cesium 80í µí°· 5/2 -Rydberg Electromagnetically Induced Transparency

Jiao, Yuechun; Hao, Liping; Bai, Jingxu; Fan, Jiabei; Bai, Zhengyang; Li, Weibin; Zhao, Jianming; Jia, Suotang

Abstract

We study Rydberg electromagnetically induced transparency (EIT) of a cascade three-level atom involving 80í µí°· 5/2 state in a strong interaction regime employing a cesium ultracold cloud. In our experiment, a strong coupling laser couples 6í µí±ƒ 3/2 to 80í µí°· 5/2 transition, while a weak probe, driving 6í µí±† 1/2 to 6í µí±ƒ 3/2 transition, probes the coupling induced EIT signal. At the two-photon resonance, we observe that the EIT transmission decreases slowly with time, which is a signature of interaction induced metastability. The dephasing rate í µí»¾ OD is extracted with optical depth OD = í µí»¾ OD í µí±¡. We find that the optical depth linearly increases with time at onset for a fixed probe incident photon number í µí± in before saturation. The dephasing rate shows a nonlinear dependence on í µí± in. The dephasing mechanism is mainly attributed to the strong dipole-dipole interactions, which leads to state transfer from í µí±›í µí°· 5/2 to other Rydberg states. We demonstrate that the typical transfer time í µí¼ 0(80í µí°·) obtained by the state selective field ionization technique is comparable with the decay time of EIT transmission í µí¼ 0(EIT). The presented experiment provides a useful tool for investigating the strong nonlinear optical effects and metastable state in Rydberg many-body systems.

Citation

Jiao, Y., Hao, L., Bai, J., Fan, J., Bai, Z., Li, W., …Jia, S. (2023). Dephasing of ultracold cesium 80í µí°· 5/2 -Rydberg Electromagnetically Induced Transparency. Optics Express, 31(5), 7545-7553. https://doi.org/10.1364/OE.479448

• Journal Article Type: Article
• Acceptance Date: Jan 20, 2023
• Online Publication Date: Feb 15, 2023
• Publication Date: Feb 27, 2023
• Deposit Date: Mar 13, 2023
• Publicly Available Date: Mar 24, 2023
• Journal: Optics Express
• Electronic ISSN: 1094-4087
• Publisher: Optical Society of America
• Peer Reviewed: Peer Reviewed
• Volume: 31
• Issue: 5
• Pages: 7545-7553
• DOI: https://doi.org/10.1364/OE.479448
• Public URL: https://nottingham-repository.worktribe.com/output/17380954
• Publisher URL: https://opg.optica.org/oe/fulltext.cfm?uri=oe-31-5-7545&id=526240