对称强双色共振场中弛豫效应对二能级系统斯塔克分裂的影响

本文应用半径典理论、密度矩阵方法和探索场中二能级系统的能级斯塔克(Stark)分裂。指出与无弛豫效应相比较,弛予效应不仅改变了由光学斯塔克效应所产生的分裂能级的权重、展宽了这些能级,而且还出现新的分裂能级。

On the relaxation effect of Stark splitted levels for a two-level system interacting with a symmetrical strong resonant bichromatic field

Using the semi-classical theory, density" matrix method and probe-field approximation and taking into account the relaxation effect, we have investigate the Stark split phenomenon for a two-level system interacting with a strong resonant biohromatic field. In the case of two strong fields having same amplitude and symmetrical detuning of frequency, the relaxation effect not only influences the weight of splitted levels created from the optical Stark effect and broadens these levels, but new splitted levels can be found in a new position. It is predicted that new satellite lines of spectra can be observed in optical spectrum. These results, differ considerably from that in the case of mono-chromatic field and previous work on the biohromatic field without taking into consideration of the relaxation. In the case of mono-chromatic the effect of relaxation only influences the weight and width of Stark splitted levels, but no new splitted levels can be found. Because the relaxation effect produced by spontaneous emission between upper and lower levels in real atom and molecule system, usually cannot be neglected, the results of this paper can be used in practical applications.