两个正交子能级的V型三能级系统的粒子数振荡特性

Rabi Flopping in a V-type three-level system with two orthogonal eigenstates

研究了线偏振脉冲光场激发下 ,半导体量子点中两个正交子能级上的粒子数振荡特性 .利用旋转波近似方法给出了共振激发和无衰减时粒子数运动方程的解析解 .引入了该系统的等效跃迁偶极矩和等效脉冲面积 ,并给出了其关系表达式 .理论分析表明 ,该体系中的子能级上粒子数振荡的振幅和频率都可以通过改变激发场的偏振角和系统的初态条件进行调控 .

The oscillation characteristics of populations in two orthogonal energy sub-states of semiconductor quantum dots (SQDs) excited by linearly polarized monochromatic pulse field were discussed. With rotating-wave approximation, the non-damped solutions of the dynamic population equations with resonance excitation were deduced. The effective transition dipole moments and effective input pulse area were introduced and their expressions were also given. Theoretical analysis showed that the amplitude and frequency of the population oscillation on the sub-states can be manipulated by adjusting the original conditions and the polarization angle of excitation field.