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建立了圆柱状量子点量子导线复合系统中激子满足的方程,用微扰论求出激子能量.以CdS/HgS/CdS/HgS/CdS圆柱状量子点量子导线复合系统为例,研究了系统中电子的概率分布和系统线度对激子能量的影响.结果表明:系统中电子、空穴以及激子的能量均随量子点高度h0的增大而减小,电子-空穴相互作用对基态激子能量的影响要大于激发态;电子沿径向方向的概率分布呈起伏状,在轴线和表面附近的概率趋于零,而在R/2附近概率最大;在量子点附近电子沿轴向方向的概率分布呈振荡特征.
The equation of exciton satisfaction in the quantum dot quantum conductor system with cylindrical quantum dots is established, and the exciton energy is obtained by the perturbation theory. Taking CdS / HgS / CdS / HgS / CdS cylindrical quantum dot quantum wire composite system as an example, The probability distribution of the electrons in the system and the influence of the system linearity on the exciton energy.The results show that the energies of electrons, holes and excitons decrease with the increase of the quantum dot height h0, and the electron-hole interaction The excited states are more affected than the excited state; the probability distribution of electrons along the radial direction is undulating, the probability approaches zero near the axis and the surface, and the probability is the highest near R / 2; The probability distribution in the axial direction is oscillatory.