▎ 摘　　要

The surface plasmon polaritons (SPPs) are excited at the interface of sodium and graphene media due to the effective control of dielectric functions of the two media. The absorption and dispersion behaviors of SPPs waves are modified with changing the strength of control fields and their phases. The normal and anomalous SPPs dispersion are controlled for slow and fast SPPs propagation. The group index changes in the range -2000