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

Abstract:

The influence of coulomb field on the properties of the excited state of weak-coupling polaron in an asymmetric quantum dot was studied by the linear combination operator and unitary transformation method. The relations of the vibrational frequency, the first excited state energy of the weak-coupling polaron in an asymmetric quantum dot with the effective confinement length of the quantum dot, Coulomb bound potential of the weak-coupling polaron in an asymmetric quantum dot are obtained. It is shown by evaluating numerically that the vibrational frequency, the first internal excited state energy increase rapidly with the effective confinement length decrease when the Coulomb bound potential is determined, and the vibrational frequency increase with the Coulomb bound potential increase, the first internal excited state energy have minimal value with the Coulomb bound potential increase when effective confinement length is determined.

Key words: optoelectronics, asymmetric quantum dot, linear combination operator, weak-coupling polaron, Coulomb field