Gap surface plasmon polaritons enhanced by a plasmonic lens: "Hyun Chul Kim, Xing Cheng
We numerically investigate the optical field enhancement based on gap surface plasmon polaritons (GSPPs) that are enhanced by propagating surface waves launched by a circular slit at a metal–dielectric interface. The optical field enhancement originates not only from multiple scattering and ... [Opt. Lett. 36, 3082-3084 (2011)]"
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