Slow-light six-wave mixing at low light intensities.
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.
Department of Physics, Florida International University, Miami, Florida 33199, USA.
Hoonsoo
H
Kang
Gessler
G
Hernandez
Yifu
Y
Zhu