Regenerated surface plasmon polaritons

摘要

We discuss a way to increase surface plasmon polariton (SPP) propagation lengths and intensities. It involves reflecting radiation loss back to the propagation surface, regenerating SPPs. This is achieved with a metal-dielectric structure, which is also designed to efficiently couple in external light. Flexibility in the design of the structure allows for optimization of SPP properties. Extensive finite-difference time-domain simulations, including coupling external light into the system, demonstrate the approach.