We investigate magneto-optical rotation (MOR) of surface plasmon polaritons (SPPs) at the interface of a metal and a four-level atomic system. The MOR of SPPs can be controlled and modified with the intensity and frequency of the applied fields. We show the birefringence enhancement of the weak probe fields propagating through the atomic medium in the presence of the static magnetic field. The external magnetic field has a vital role in the generation and control over the MOR of SPPs. The MOR completely stops when either the external magnetic field or the probe field or both are tuned to resonance. A pretty behavior of MOR of SPPs is observed for a specific set of control field frequency. The enhanced MOR of SPP has significant applications in atomic spectroscopy, optical communication, nano-photonics, optical switches, and precise measurement.

我们调查在金属和四能级原子系统的界面处的表面等离振子极化子（SPPs）的磁光旋转（MOR）。SPP的MOR可以通过所施加场的强度和频率进行控制和修改。我们显示了在存在静态磁场的情况下，通过原子介质传播的弱探针场的双折射增强。外部磁场在SPP的MOR的产生和控制中起着至关重要的作用。当外部磁场或探测场或两者都调谐到共振时，MOR完全停止。对于一组特定的控制场频率，观察到了SPP MOR的漂亮行为。SPP的增强的MOR可以在原子光谱，光通信，纳米光子学，光学开关和精确测量中具有重要的应用。