Optical pumping-assisted electromagnetically induced transparency

被引：28
|
作者：
Jiang, Wei [1 ]
Chen, Qun-feng [1 ]
Zhang, Yong-sheng [1 ]
Guo, G. -C. [1 ]
机构：
[1] Univ Sci & Technol China, Key Lab Quantum Informat, Hefei 230026, Peoples R China
来源：
PHYSICAL REVIEW A | 2006年 / 73卷 / 05期
关键词：
D O I：
10.1103/PhysRevA.73.053804
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper we report an observation of the two-photon absorption in a four-level system in hot Rb-87 vapor based on the proposal of Harris and Yamamoto [Phys. Rev. Lett. 81, 3611 (1998)]. We show that this effect is reduced in hot atoms due to the non-Doppler-free nature of this scheme. Then we report a phenomenon that could be used in the same application of Harris and Yamamoto. The main result is a great enhancement of electromagnetically induced transparency (EIT) effect in hot Rb-87 vapor caused by optical pumping. We find that when the single photon detuning is near zero the EIT signal is dramatically enhanced by an optical pumping field. More interestingly when the single photon detuning is larger the signal can be changed from a sharp Raman peak to a sharp EIT dip. The full width at half maximum of the peak and dip are narrow and subnatural.
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页数：7
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