Abstract The giant enhancement of Kerr nonlinearity in a four-level tripod type system is investigated theoretically. By tuning the value of the Rabi frequency of the coherent control field, owing to the double dark resonances, the giant-enhanced Kerr nonlinearity can be achieved within the right transparency window. The influence of Doppler broadening is also discussed.
Received: 11 February 2006
Revised: 01 September 2006
Accepted manuscript online:
PACS:
42.65.Hw
(Phase conjugation; photorefractive and Kerr effects)
(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 60478002) and the Key
Basic Research Foundation of Shanghai (Grant Nos 04JC14036 and
05DJ14003).
Cite this article:
Sun Hui(孙辉), Niu Yue-Ping(钮月萍), and Gong Shang-Qing(龚尚庆) Enhancement of Kerr nonlinearity with vanishing absorption in a tripod scheme 2007 Chinese Physics 16 429
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