论文部分内容阅读
采用线性组合算符和幺正变换方法,研究非对称量子点中强耦合磁极化子的激发态性质.导出强耦合磁极化子的第一内部激发态能量、激发能量和从第一内部激发态到基态的跃迁频率随量子点的横向和纵向有效受限长度、磁场的回旋频率和电子-声子耦合强度的变化关系.数值计算结果表明:第一内部激发态能量、激发能量和跃迁频率随回旋频率和电子-声子耦合强度的增加而增大.随横向和纵向有效受限长度的减小而迅速增大,表现出奇特的量子尺寸限制效应.
The linear combination operator and unitary transform method are used to study the excited state properties of strongly coupled magnetopolaron in asymmetric quantum dots. The first internal excited state energy and excitation energy of the strongly coupled magnetic polaron are derived. The transition frequency to the ground state depends on the length of the quantum dot in the horizontal and vertical directions, the gyration frequency of the magnetic field and the electron-phonon coupling strength. Numerical results show that the energy of the first internal excited state, the excitation energy and the transition frequency Cyclotron frequency and electron-phonon coupling strength increase rapidly with the horizontal and vertical effective limited length decreases rapidly, showing a peculiar quantum size limiting effect.