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态能量及振动频率的影响.导出了非对称量子点中弱耦合极化子的激发态能量、振动频率随量子点的横向和纵向有效受限长度、库仑束缚势和电子-声子耦合强度的变化关系.结果表明:当库仑束缚势一定时,束缚极化子的振动频率、极化子第一内部激发态能量随量子点有效受限长度的减小而迅速增大,随库仑束缚势的变化而变化,第一内部激发态能量随库仑束缚势的变化有一个极小值.
参考文献
| [1] | Huybrechts W J.Internal excited state of the optical polaron[J].J.Phys.C,1997,10:3761-3968. |
| [2] | Zhou H Y,Gu S W,Shi Y M.Effects of strong coupling magnetopolaron in quantum dot[J].Mod.Phys.Lett.B,1998,12(17):693-701. |
| [3] | Kandemir B S,Cetin A.Ground-and first-excited state energies of impurity magnetopolaron in an anisotropic quantum dot[J].Phys.Rev.B,2002,65(5):054303-1-11. |
| [4] | Xiao Wei,Xiao Jinglin.Properties of polaron in an asymmetric quantum dot[J].Chin.J.Lumin.(发光学报)2006,27(6):849-855. |
| [5] | Liu Yamin,Xiao Jinglin.Mean number of phonons for polaron in an asymmetric quantum dot[J].Chin.J.Lumin.(发光学报),2006,27(6):866-870 (in Chinese). |
| [6] | Xiao Jinglin,Xu Qiu.Properties of weak-coupling bound polaron in an asymmetric quantum dot[J].Chin.J.Lumin.(发光学报),2008,29(1):15-18 (in Chinese). |
| [7] | Xu Jie,Xiao Jinglin.Influence of the coulomb field on the mean number of phonons for strong-coupling polaron in an asymmetric quantum dot[J].Chin.J.Lumin.(发光学报),2008,29(3):547-550 (in Chinese). |
| [8] | Eerduncaolu,Wang Baochang.Influence of temperature on the mean number of phonons for strong-coupling magnetopolaron in an asymmetric quantum dot[J].Chinese Journal of Quantum Electronics(量子电子学报),2009,26 (4):477-481 (in Chinese). |
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