Polychromatic nanofocusing of surface plasmon polaritons

TL;DR

This paper introduces a broadband plasmonic lens capable of nanofocusing surface plasmon polaritons across an optical octave, enabling new applications in polychromatic plasmonics.

Contribution

The paper proposes a novel parabolically modulated metal-dielectric-metal structure for broadband nanofocusing of surface plasmon polaritons, expanding the scope of plasmonic devices.

Findings

Achieves over an optical octave bandwidth

Demonstrates effective nanofocusing of surface plasmon polaritons

Opens new possibilities for broadband plasmonic applications

Abstract

We introduce the concept of polychromatic plasmonics and suggest an broadband plasmonic lens for nanofocusing of surface plasmon polaritons. The lens employs a parabolically modulated metal-dielectric-metal structure. This plasmonic lens has a bandwidth of more than an optical octave thus opening new opportunities for broadband plasmonic applications.