Low-loss nonlinear polaritonics

Low-loss nonlinear polaritonics1 BARRY SANDERS, Uni-\r\nversity of Calgary, SERGEY MOISEEV, Kazan Physical-Technical\r\n We propose large low-loss cross-phase modulation be-\r\ntween two coupled surface polaritons propagating through a double\r\nelectromagnetically-induced transparency medium situated close to a\r\nnegative-index metamaterial. A mutual pi phase shift is attainable be-\r\ntween the two pulses at the single photon level.