  Nonlinear plasmonic effects in perspective 2D materials containing
low-dimensional quantum emitters can be a basis of a novel technological
platform for the fabrication of fast all-plasmonic triggers, transistors, and
sensors. This article considers the conditions for achieving a strong
plasmon-exciton coupling in the system with quantum nanowire (NW) placed in
proximity to the nanostructured graphene sheets. In the condition of strong
coupling, nonlinear interaction between two surface plasmon-polariton (SPP)
modes propagating along the graphene waveguide integrated with a stub
nanoresonator loaded with a core-shell semiconductor NWs is investigated. Using
the 2D full-wave electromagnetic simulation, we studied the different
transmittance regimes of the stub with NW for both the strong pump SPP and weak
signal SPP tuned to interband and intraband transition in NW, respectively. We
found such a regime of NW-SPP interaction that corresponds to the destructive
interference with the signal SPP transmittance through the stub less than 7% in
the case for pump SPP to be turned off. In contrast, the turning on the pump
SPP leads to a transition to constructive interference in the stub and
enhancement of signal SPP transmittance to 93%. In our model, the effect of
plasmonic switching occurs with a rate of 50 GHz at wavelength 8 um for signal
SPP localized inside 20 nm graphene stub loaded with core-shell InAs/ZnS NW.
