| Quantum optics is an important subject, and its main research is the quantum properties of light field, the interaction between light and matter.Due to the effect of the driving light field, the atom located in the lower state will translate to the upper state, then go back to the lower state spontaneously, and radiate the photons, this process is called resonance fluorescence.The first theory of Resonance fluorescence was established by Mollow in1969, and was confirmed by experiment by Schuda in1974, then raised a hot wave of the resonance fluorescence. For the study of in-teraction between light and atoms, we can adopt two kinds of different processing methods, namely the semi-classical theory or full quantum theory, And mainly re-search the difference and characteristics of the atomic fluorescence spectrum,under the two different processing method.This paper we mainly studies the characteristics of fluorspar spectral of cascade three-level atom under the the incoherent pumping, and discuss the change of the spectrum when adding the quantum cavity. Because the driving light field can either do classic processing or do quantum processing again, so we mainly observe the difference of fluorspar spectrum,the change of fluorspar spectrum due to system parameters change in this paper, when we do two kinds of different processing of the field. The first part, when the driving light field is classic, adjust the detuning between the atomic intrinsic transition frequency and the driving frequency of light field, the fluorspar spectrum of atom can present a different five and seven peaks structure; The second part, when the driving light field is a quantum field, the atomic fluorspar spectrum not only has relationship with detuning, also with the parameters of the cavity field, By adjusting the parameters, we will find when given the quantum cavity, the atomic fluorescence spectrum can present Super-narrow linewidth fluorescence, the peak splitting phenomenon,under certain conditions. |
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