Femtosecond coherent control of surface plasmon propagating direction

We have demonstrated the directional control of surface plasmon polariton(SPP) waves through propagating in an asymmetric plasmonic Bragg resonator using femtosecond temporal-phase control via the resonant coupling of SPPs and the interference of SPPs. The near-field images display significant temporal-phase dependence, switching between left and right propagation after the Bragg resonator.

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