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采用线性组合算符和幺正变换方法,研究了库仑场对非对称量子点中弱耦合极化子激发能量的影响。导出了非对称量子点中弱耦合极化子的跃迁频率和激发能量随量子点的横向和纵向有效受限长度及库仑束缚势的变化关系。结果表明:当库仑束缚势一定时,束缚极化子的跃迁频率和激发能量随量子点的有效受限长度的减小而迅速增大,跃迁频率和激发能量随库仑束缚势的增加而增大。
Linear combinatorial operators and unitary transformation methods were used to study the influence of Coulomb fields on the excited energy of the weakly coupled polaron in asymmetric quantum dots. The transition frequencies and excitation energies of weakly coupled polarons in asymmetric quantum dots are deduced as a function of quantum length and the confinement potential. The results show that when Coulomb’s binding potential is constant, the transition frequency and excitation energy of the bound polaron rapidly increase with the decrease of the effective confinement length of quantum dots, and the transition frequency and excitation energy increase with the increase of Coulomb bondage .