摘要
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。
The influence of coulomb field to excitation energy on the weak-coupling polaron in an asymmetric quantum dot has been studied by making use of the linear combination operator and the unitary transformation method.It is obtained that the transition frequency and the excited energy of the weakcoupling polaron change with the effective confinement length of the quantum dot and the Coulomb bound potential in an asymmetric quantum dot.It is shown that the transition frequency and the excited energy increase rapidly with decreasing effective confinement length when the Coulomb bound potential is a constant value.And the transition frequency and excited energy increase with the increasing Coulomb bound potential.
出处
《量子光学学报》
CSCD
北大核心
2013年第4期358-361,共4页
Journal of Quantum Optics
基金
内蒙古自治区高等学校科研项目(NJZY12118)
关键词
光电子学
非对称量子点
线性组合算符
弱耦合极化子
库仑场
Optoelectronics
Asymmetric quantum dot
Linear combination operator
Weak-coupling Polaron
coulomb field
