Resonance Fluorescence of a Driven V-Type Three-Level Atom

We investigate the resonance fluorescence spectrum of a three-level atom driven by two coherent laser fields in a V-type three levels with emphasis on the detuning effect. In the presence of the detuning of the first laser from exact resonance, there emerge some new structures in the resonance fluorescence spectrum. By applying the dressed-atom theory, we give an explanation for these interesting phenomena.