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采用推广的LLP方法研究了ZnSe/ZnS抛物量子阱中激子的极化子效应。考虑电子和空穴与LO声子的相互作用,得到了激子基态能量和结合能随阱宽的变化关系。结果表明,阱宽较小时,能量随着阱宽的增大而急剧减小;阱宽较大时,能量减小的比较缓慢。和我们以前的工作对比,我们发现ZnSe/ZnS抛物量子阱对激子的束缚强于GaAs/Ga1-xAlxAs抛物量子阱。
The polaron effect of excitons in the ZnSe / ZnS parabolic quantum well has been studied by the extended LLP method. Considering the interaction of electrons and holes with LO phonons, we get the relationship between the energy of the exciton ground state and the binding energy with the well width. The results show that when the well width is small, the energy decreases sharply with the increase of the well width. When the well width is large, the energy decreases slowly. In contrast to our previous work, we find that the ZnSe / ZnS parabolic quantum well has stronger binding to excitons than GaAs / Ga1-xAlxAs parabolic quantum wells.