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By using the real-space method, switching of a single plasmon interactingwith a hybrid nanosystem composed of a semiconductor quantum dot (SQD) and ametallic nanoparticle (MNP) coupled to one-dimensional surface plasmonicwaveguide is investigated theoretically. We discussed that the dipole couplingbetween an exciton and a localized surface plasmon results in the formation ofa hybrid exciton and the transmission and reflection of the propagating singleplasmon could be controlled by changing the interparticle distance between theSQD and the MNP and the size of the nanoparticles. The controllable transportof the propagating single surface plasmon by such a nanosystem discussed herecould find the significant potential in the design of next-generation quantumdevices such as plasmonic switch, single photon transistor and nanolaser andquantum information.

Coherent Controllable Transport of a Surface Plasmon Coupled to  Plasmonic Waveguide with a Metal Nano Particle-Semiconductor Quantum Dot  Hybrid System