  The emerging field of plasmonics can lead to enhanced light matter
interactions at extremely nanoscale regions. Plasmonic (metallic) devices
promise to efficiently control both classical and quantum properties of light.
Plasmonic waveguides are usually used to excite confined electromagnetic modes
at the nanoscale that can strongly interact with matter. The analysis of these
nanowaveguides exhibits similarities with their low frequency microwave
counterparts. In this article, we review ways to study plasmonic nanostructures
coupled to quantum optical emitters from a classical electromagnetic
perspective. These quantum emitters are mainly used to generate single photon
quantum light that can be employed as a quantum bit or qubit in the envisioned
quantum information technologies. We demonstrate different ways to enhance a
diverse range of quantum electrodynamic phenomena based on plasmonic
configurations by using the classical dyadic tensor Green function formalism.
More specifically, spontaneous emission and superradiance are analyzed by using
the Green function based field quantization. The exciting new field of quantum
plasmonics will lead to a plethora of novel optical devices for communications
and computing applications operating in the quantum realm, such as efficient
single-photon sources, quantum sensors, and compact on-chip nanophotonic
circuits.
