Abstract
We investigate the possibility of generating nonlinear surface polaritons at the interface between a negative-index metamaterial and a dielectric doped with two-level quantum emitters by means of coherent population oscillation (CPO) working at room temperature. Based on the CPO and the strong confinement of the optical field near the interface, we find that the system can possess a giant Kerr nonlinearity. We demonstrate that it is possible to obtain a type of surface polaritonic solitons which is not only robust during propagation but also has ultraweak generation power and superluminal propagating velocity.
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