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Center for Nonlinear Studies |
We examine the emergent physical properties of nanoscale (near- field) interactions between confined carriers/excitons and surface-plasmons in hybrid semiconductor-metal nanostructures. In particular this talk will discuss our theoretical study on both the charge carrier and exciton motion in one-dimensional semiconductor nanostructures (e.g., carbon nanotubes) in the presence of a single proximal metal nanoparticle. The e ffect of the charge-surface-plasmon interaction is treated in a method analogous to the polaron problem. This allows us to calculate zero-point dynamical quantum corrections to the charge-image potential which leads to the formation of a tunneling barrier controlling the charge transmission through the one-dimensional nanostructure. This eff ect could be exploited to create a nanoscale field eff ect transistor. Considering exciton transport, we show that the problem maps onto that of exciton scattering on an impurity state. We demonstrate that the surface-plasmon resonance leads to the formation of a localized band-gap state which dramatically influences the exciton-plasmon radiation pattern.