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用面间力常数模型计算了(0001)方向纤锌矿结构GaN与AIN的纵向振动特性.并利用该模型对(0001)方向生长的六角结构的GaN/AIN超品格的纵向声子态进行了研究.着重讨论了超品格声子的限制效应.“,”A planar force-constant model is developed to calculate the longitudinal phonons propagating in the [000l] direction in wurtzite GaN and AIN. The proposed planar force-constant model is then applied to study the longitudinal phonon modes in hexagonal (0001)-oriented GaN/AIN superlattices. The confinement of the supperlattice phonons is stressed.