Transport properties of surface plasmons in a nonlinear nanowire coupled to quantum dots with azimuthal angle differences

We investigate single surface-plasmon transport in a nonlinear nanowire strongly coupled to multiple quantum dots with azimuthal angle differences. Exact expressions for the scattering coefficients are obtained by adopting the real-space Hamiltonian and the transfer matrix approach. Fano-like resonance and jiggling behavior in the scattering spectra are exhibited, and a plasmonic switch can be achieved, by adjusting azimuthal angle differences of quantum dots. The periodic transmission and reflection profile is also revealed at specific azimuthal angles. These results show that the azimuthal angle may be utilized as a new handle to control the surface plasmon transport.