Nonlinear optics with surface polaritons

We discuss basic properties of surface polaritons (SP) qubits, namely confinement and losses in the presence of a meta material interface. Using electromagnetically induced transparency technique we show that SPs modes can be controlled, manipulated and slowed down to very low velocities. This enables information encoded in SP qubits to be stored and retrieved according to EIT protocol. Furthermore employing double EIT mechanism we demonstrate that the interaction of two SP qubits can generate large Kerr nonlinearity with phase shift of order π which is essential for application in quantum phase gates a necessary ingredient in quantum computing.

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S. A. Moiseev, A. A. Kamli and B. C. Sanders; Phys. Rev. A 81, 033839 (2010).