Abstract
We propose a scheme to realize highly efficient and controllable surface polariton beam splitters with a hybrid system via the electromagnetically induced transparency (EIT) of quantum emitters doped near the interface between a metamaterial and a dielectric. By means of the destructive interference effects contributed by the EIT of the quantum emitters and by the electric-magnetic response of the metamaterial, we show that such beam splitters can work at very low light level and they have small quantum decoherence and low Ohmic loss; moreover, the propagation loss of the surface polaritons can be reduced further by using weak microwave fields and the dispersion effect of the surface polaritons can be balanced by using the EIT-enhanced Kerr effect. Therefore, the surface polariton beam splitters obtained here have high splitting efficiency and may be controlled actively. Our study opens a route not only for coherent and active control of low-loss surface polaritons but also for promising applications in optical information processing based on quantum hybrid systems.
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