Optical pumping-assisted electromagnetically induced transparency

Journal Article · Mon May 15 04:00:00 EDT 2006 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.73.0· OSTI ID:20787298

Wei, Jiang; Qunfeng, Chen; Yongsheng, Zhang; Guo, G -C ^[1]

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1. Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026 (China)

In this paper we report an observation of the two-photon absorption in a four-level system in hot {sup 87}Rb 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 {sup 87}Rb 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.

• OSTI ID: 20787298
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 73; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
ATOMS
MULTI-PHOTON PROCESSES
OPACITY
OPTICAL PUMPING
PHOTON-ATOM COLLISIONS
PHOTONS
RUBIDIUM
RUBIDIUM 87
SIGNALS
VAPORS