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Slow-Light Six-Wave Mixing at Low Light Intensities

2004; American Physical Society; Volume: 93; Issue: 7 Linguagem: Inglês

10.1103/physrevlett.93.073601

1092-0145

Hoonsoo Kang, Gessler Hernandez, Yifu Zhu,

Cold Atom Physics and Bose-Einstein Condensates

We report an experimental study of resonant six-wave mixing in coherently prepared Rb atoms. Electromagnetically induced transparency in a four-level atomic system suppresses the linear susceptibility and enhances the nonlinear susceptibilities, which leads to the resonantly enhanced, slow-photon six-wave mixing at low light intensities. The light emission in the six-wave mixing process can be viewed as resulting from diffraction of slow light off a resonant nonlinear grating induced in the four-level system by a standing-wave pump field.