  We proposed an experimentally feasible scheme of nano-plamonic switch and
quantum router via the single self-assembled InGaAs/GaAs semiconductor quantum
dot (SQD) with a V type three-level energy structure located between two silver
metallic waveguides. We studied theoretically transmission and transfer rates
of single plasmons in such a multi-ports system via the real-space approach,
where our results showed that single plasmons from the input port could be
switchable and redirected by controlling parameters, such as the intensity of
the classical field, the detunings, and the interaction between the SQD and the
waveguides. Our proposed scheme could be used not only in the design of quantum
routers and quantum switches for the construction of quantum network, but also
in quantum photonic integrated circuits.
