Influence of the flip–flop interaction on a single plasmon transport in 1D waveguide

Transport of a single plasmon in the 1D waveguide coupled to two emitters with the flip–flop interaction is discussed theoretically via the real-space approach. We showed that the transmission and reflection of a single plasmon could be changeable by adjusting the flip–flop coupling strength of the QDs, the interaction of QDs with the metallic nanowaveguide, interparticle distance of the QDs and detuning. Setting the interparticle distances properly results in the switching between the complete transmission and the complete reflection. Especially, our results show that the QDs with the flip–flop interaction play important role in the transport of the propagating single plasmon, which is relevant to the Forster resonance energy transfer from donor QD to acceptor QD.