Interface phonon—polaritons in quantum well systems of polar ternary mixed crystals     

包锦  梁希侠 《海洋学报(英文版)》2010,29(9)

The interface phonon--polaritons in quantum well systems consisting of polar ternary mixed crystals are investigated. The numerical results of the interface phonon--polariton frequencies in the GaAs/Al_xGa_{1 - x}As, ZnS_xSe_{1 - x}/ZnS, and Zn_xCd_{1 - x}Se/ ZnSe quantum well systems are obtained and discussed. It is shown that there are six branches of interface phonon--polariton modes distributed in three bulk phonon--polariton forbidden bands in the systems. The electric fields of interface phonon--polaritons are also presented and show the interface locality of the modes. The effects of the 'two-mode' and 'one-mode' behaviours of the ternary mixed crystals on the interface phonon--polariton modes are shown in the dispersion curves.  相似文献