Linewidth of electromagnetically induced transparency under motional averaging in coated vapor cell

doi:10.1088/1674-1056/22/3/033202

Abstract The linewidth of electromagnetically induced transparency (EIT) in a coated Rb vapor cell was studied under a magnetic field gradient. The nonlinear broadening of the EIT linewidth with the magnetic field gradient was observed. It was found that the motional averaging of the field gradient was more pronounced at higher laser intensities and larger beam sizes. In the same regime, there was a small linewidth decrease with the increasing magnetic field gradient. We have established a Monte–Carlo model, which gave results in good qualitative agreement with our experiment. Physics pictures for the above phenomena were also suggested. These results provide an understanding of the EIT linewidth behavior under the motional averaging, and should be useful for applications in quantum optics and metrology based on coated vapor cells.

Keywords: electromagnetically induced transparency coated cell linewidth motional averaging

Received: 12 October 2012
Revised: 30 November 2012
Accepted manuscript online:

PACS:	32.70.Jz	(Line shapes, widths, and shifts)
	32.80.Qk	(Coherent control of atomic interactions with photons)
	42.50.Gy	(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
	42.62.Fi	(Laser spectroscopy)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61078013 and J1103204), the Shanghai Pujiang Program, China (Grant No. 10PJ1401400), the National Basic Research Program of China (Grant Nos. 2011CB921604 and 2012CB921604), and the Fudan University, China.

Corresponding Authors: Xiao Yan-Hong
E-mail: yxiao@fudan.edu.cn

Cite this article:

Xu Zhi-Xiang (徐智翔), Qu Wei-Zhi (曲伟智), Gao Ran (高然), Hu Xin-Hua (胡新华), Xiao Yan-Hong (肖艳红) Linewidth of electromagnetically induced transparency under motional averaging in coated vapor cell 2013 Chin. Phys. B 22 033202

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Linewidth of electromagnetically induced transparency under motional averaging in coated vapor cell

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