Rabi oscillations in spasers during nonradiative plasmon excitation

In the approach to the stationary regime, a surface plasmon amplification by stimulated emission of radiation exhibits complicated and highly nonlinear dynamics with anharmonic oscillations [M. I. Stockman, J. Opt. 12, 024004 (2010)]. We demonstrate that these oscillations are due to Rabi oscillations of the quantum dot in the field of the nanoparticle. We show that oscillations may or may not arise depending on the initial conditions.