In this research, I have conceived and realized a pioneering development of a surface plasmon polariton nanolaser that harnesses graphene as its fundamental constituent. This unique nanolaser exhibits a distinctive feature: the ability to modulate its operation by applying an externally applied current while concurrently being optically stimulated. My investigation revolves around the innovative achievement of effectively switching the plasmonic nanolaser on and off for the very first time, making a milestone in the realm of nanophotonics. The utilization of graphene within the structural framework of the SPP nanolaser capitalizes on its extraordinary carrier mobility and remarkable electrical properties, thus rendering it an auspicious contender for integration into opto - electronic integrated circuits. This study presents a comprehensive exposition of experimental findings, illuminating the profound influence of graphene on the performance of plasmonic nanolasers, and delves into the underlying mechanistic intricacies