ELECTROMAGNETICALLY INDUCED FOCUSING IN A $\Lambda$-TYPE MEDIUM
GONG SHANG-QING (龚尚庆)a, XU ZHI-ZHAN (徐至展)a, PAN SHAO-HUAb
a Shanghai Institute of Optics and Fine Mechanics, Academia Sinica, Shanghai 201800, China; b Institute of Physics, Academia Sinica, Beijing 100080, China
Abstract Electromagnetlcally induced transparency (EIT) in an inhomogenously broadened medium consisting of $\Lambda$-type three-level atoms has been analyzed. It is shown that the A system can induce a transparency of the medhun when the probe laser and the coupling laser have the same frequency detunings (including zero). Across the EIT window, the radial variation of the strong coupling laser radiation may lead to electromagnetically induced focusing or defocusing of the weak probe laser at separate probe frequency detuning points.
Received: 17 October 1995
Accepted manuscript online:
PACS:
42.50.Gy
(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
(Mechanical effects of light on atoms, molecules, and ions)
Fund: Project supported by the National Natural Science Foundation of China.
Cite this article:
GONG SHANG-QING (龚尚庆), XU ZHI-ZHAN (徐至展), PAN SHAO-HUA ELECTROMAGNETICALLY INDUCED FOCUSING IN A $\Lambda$-TYPE MEDIUM 1997 Acta Physica Sinica (Overseas Edition) 6 13
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