Manipulating Surface Plasmons Propagation Using Ultra-Compact and Non-Dielectric Designs

Riley, J; Healy, N; Pacheco-Peña, V

doi:10.1109/Metamaterials49557.2020.9285072

Manipulating Surface Plasmons Propagation Using Ultra-Compact and Non-Dielectric Designs

Lookup NU author(s): Dr Joseph Riley, Professor Noel Healy ORCiD, Dr Victor Pacheco Pena ORCiD

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Abstract

The work presents a method capable of manipulating and controlling the propagation of surface plasmons using plasmonic structures composed of only metals. In our approach, we make use of a semi-infinite silver block inserted into another semi-infinite medium made of rhodium. To design the structures here studied, the effective medium concept is exploited by considering that surface plasmons propagate at the air-metal interface with an effective refractive index. Here we design, demonstrate and evaluate a plano-convex lens with the ability to focus the incident surface plasmons onto a single focal spot.