三元混晶四层系统的表面和界面声子极化激元?

包锦; 闫翠玲; 闫祖威

doi:10.7498/aps.63.107105

内蒙古农业大学理学院,呼和浩特,010018

Surface and interface phonon-p olaritons in four layer systems consisting of p olar ternary mixed crystals

摘要: 运用改进的无规元素等位移模型和玻恩-黄近似，结合电磁场的麦克斯韦方程和边界条件，研究了真空/极性二元晶体薄膜/极性三元混晶薄膜/极性二元晶体衬底四层系统的表面和界面声子极化激元。以AlxGa1?xAs/GaAs和ZnxCd1?xSe/ZnSe为例，获得了表面和界面声子极化激元模的色散关系以及表面模和界面模的频率随混晶组分和薄膜厚度的变化关系。结果表明，三元混晶四层异质结系统中存在七支表面和界面声子极化激元模，且这七支表面模和界面模的频率随混晶组分和薄膜厚度呈非线性变化，三元混晶的“单模”和“双模”性也在色散曲线中得到了很好的体现。

关键词:

Abstract: Surface and interface phonon-polaritons in a four-layer (vacuum/polar binary crystal slab/polar ternary mixed crystal slab/polar binary crystal substrate) system are investigated with the modified random-element-isodisplacement model and the Born-Huang approximation, based on the Maxwell’s equations with the usual boundary conditions. The numerical results of the surface and interface phonon-polariton frequencies as functions of the wave-vector, composition x, and thickness of slab in the two four-layer systems, i.e., AlxGa1?xAs/GaAs and ZnxCd1?xSe/ZnSe, are obtained and discussed. It is shown that there are seven branches of surface and interface phonon-polariton modes in the het-erostructure systems, and that the frequencies of the surface and interface modes vary non-linearly with the composition and thickness of slab. The “one mode” and “two mode” behaviors of the ternary mixed crystals are also shown in the dispersion curves.

三元混晶四层系统的表面和界面声子极化激元?

内蒙古农业大学理学院,呼和浩特,010018

关键词:

Surface and interface phonon-p olaritons in four layer systems consisting of p olar ternary mixed crystals

内蒙古农业大学理学院,呼和浩特,010018

Keywords:

全文HTML

参考文献 (0)