Kang Hoonsoo, Hernandez Gessler, Zhu Yifu
Department of Physics, Florida International University, Miami, Florida 33199, USA.
Phys Rev Lett. 2004 Aug 13;93(7):073601. doi: 10.1103/PhysRevLett.93.073601. Epub 2004 Aug 10.
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.
我们报告了一项关于相干制备的铷原子中共振六波混频的实验研究。四能级原子系统中的电磁感应透明抑制了线性极化率并增强了非线性极化率，这导致在低光强下共振增强的慢光六波混频。六波混频过程中的光发射可被视为由驻波泵浦场在四能级系统中诱导产生的共振非线性光栅对慢光的衍射所致。
