Controlling the transition of bright and dark states via scanning dressing field

We report the transitions between the bright and dark states of singly-dressed four-wave mixing (FWM) and doubly-dressed FWMs, and the corresponding probe transmissions by scanning the dressing field frequency detuning in a five-level atomic system. Moreover, doubly-dressed six-wave mixing with avoided-crossing plots and triple-dressed eight-wave mixing with the comparison of scanning probe field and dressing field are studied. Such controlled transitions of the nonlinear optical signals can be realizable not only in atomic vapors but also in solid medium. The investigations maybe have potential applications in optical communication, quantum information processing and optoelectronic devices, and maybe also provide a sensitive probe method to study the dressing effect.