Optical nonreciprocity of a five-level M-type atomic optical lattice in move

We investigate the dual-channel optical nonreciprocity effects of a moving atomic multilayer structure driven into a five-level M-type configuration by two strong coupling fields and two weak probe fields. We find that both the two probe fields propagating along the moving lattice will experience forward–backward asymmetry in transmission. For each one of the two probe fields, two frequency regions with very large nonreciprocity effect may exist and fit within the two AT splitting transparent windows contributed by the two coupling fields, and the degree and position of the nonreciprocity parameter could be controlled by modulating the coupling intensities and frequencies.