LAUSR

We propose a quasi-M-type atomic system for realizing the electromagnetically induced polarization grating. The results show that, due to the introduced microwave fields, the first-order diffraction efficiency of the probe field can be increased remarkably. Another advantage of the current scheme is that the two polarization components of the probe field can be decoupled through the flexible manipulation of the controlling fields in period and direction, and it can be employed to design polarization beam splitter. Such a polarization-dependent scheme may find important practical applications in classical and quantum information processing.