针对p和s两种偏振状态，研究磁性可调左手材料(LHM)和常规介电材料界面的表面等离子体激元(SPP)。详细讨论在不同的外加磁场下，SPP的色散关系及波长、传播距离和在两种介质中的穿透深度等特征长度的变化规律。发现通过改变外加磁场的大小，可调节LHM的有效磁导率，从而改变SPP的特性。当增大外加磁场强度时，SPP的特征长度曲线都向短波方向移动。

For the p and s polarizations, the surface plasmon polaritons (SPP) of magnetically tunable left-handed materials (LHM) and regular materials are investigated. The dispersion relations and characteristic lengths of SPP, including SPP wavelength, propagation distance of SPP and penetration depths of SPP in two mediums, are discussed in detail in different magnetic fields. It is shown that the properties of SPP can be controlled by the adjustment of effective magnetic permeability of metamaterials which is changed by changing the magnetic-field intensity. And the characteristic curves of SPP move to the region of short wavelength when the additional magnetic-field intensity increases.