双模热辐射腔场激励下Λ型三能级原子的辐射谱

Emission spectrum of a Λ-type three-level atom with two-mode thermal radiation cavity fields

采用时间演化算符方法,研究Λ型三能级原子与双模热辐射腔场共振相互作用的辐射谱.给出了辐射谱一般公式.并讨论在双模热辐射光场激励下的辐射频谱结构.结果表明:无论下能级简并与否,双模热辐射光场平均光子数很小时均出现拉比(Rabi)分裂;辐射谱一般呈对称的十峰结构.

By means of time-evolution operator, the emission spectrum of a A-type three-level atom interacting resonantly with two-mode thermal radiation cavity fields was studied. The physical spectrum expression of radiation emitted by the atom was given. The structure of the emission spectrum for a thermal input was discussed. The results indicate that whether two lower levels are degeneracy or not, Rabi splitting occurred in the emission spectra of A-type three-level atom when the average photon number of two-mode thermal radiation cavity fields is very small. And the structure of the resonant emission spectra of the atomic system has ten peaks generally.