A single-photon transistor using nanoscale surface plasmons

@article{Chang2007AST,
  title={A single-photon transistor using nanoscale surface plasmons},
  author={Darrick E. Chang and Anders S S{\o}rensen and Eugene A. Demler and Mikhail D. Lukin},
  journal={Nature Physics},
  year={2007},
  volume={3},
  pages={807-812}
}
Photons rarely interact—which makes it challenging to build all-optical devices in which one light signal controls another. Even in nonlinear optical media, in which two beams can interact because of their influence on the medium’s refractive index, this interaction is weak at low light levels. Here, we propose a novel approach to realizing strong nonlinear interactions at the single-photon level, by exploiting the strong coupling between individual optical emitters and propagating surface… 
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