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基于介电连续模型与Loudon的单轴晶体模型,推导分析了纤锌矿准一维量子阱线中的准受限( QC)光学声子模及相应的电子-QC光学声子之间的相互作用函数.对一个Al N/GaN/Al N纤锌矿量子阱线进行了数值计算.结果显示,当体系的角量子数m与z方向上的自由波数kz较小时,QC光学声子模的色散相当明显.观察到纤锌矿量子体系中的QC光学声子模的“退化”行为.通过电子-QC光学声子之间的耦合函数的讨论发现,高频区中的低频支QC模在电子-QC光学声子模之间的相互作用中起主要作用.计算结果还证明自由波数kz与角量子数m对电子-QC光学声子模间的耦合特性具有相似的影响.
Based on the dielectric continuum model and the uniaxial crystal model of Loudon, the interaction between the quasi-constrained (QC) optical phonon modes in wurtzite quasi-one-dimensional quantum well lines and the corresponding electron-QC optical phonons A numerical calculation of the quantum well line of AlN / GaN / AlN wurtzite shows that when the quantum number m of the system and the free wave number kz in the z direction are small, The chromatic dispersion is quite obvious. The “degeneration” behavior of QC optical phonon modes in the wurtzite quantum system is observed. The discussion of the coupling function between the optical phonons of the electron-QC reveals that the low frequency branch QC modes in the high frequency region Electron-QC optical phonon modes.The calculated results also show that the free-wave number kz and the angular quantum number m have a similar effect on the coupling characteristics between the electron-QC optical phonon modes.