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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 of the number of particles at two orthogonal sub-energy levels in a semiconductor quantum dot excited by a linearly polarized pulsed optical field is investigated. The analytical solution of the equation of motion for particles with resonance excitation and without attenuation is given. The equivalent transition dipole moment and equivalent pulse area of this system are introduced and their relation expressions are given.The theoretical analysis shows that both the amplitude and the frequency of the number of particles in the sub-energy level in the system can be changed by changing the excitation Field of polarization angle and the initial conditions of the system to regulate.