Geometrically induced modification of surface plasmons in the optical and telecom regimes

TL;DR

This paper shows how subwavelength periodic structures can significantly alter surface plasmon modes and create new tightly confined plasmon polariton modes on metallic surfaces.

Contribution

It introduces a method to modify and generate surface plasmon modes through periodic modulation and milling, advancing plasmonic control in optical and telecom regimes.

Findings

Periodic modulation strongly modifies surface plasmon guiding characteristics.

A new tightly confined surface plasmon polariton mode can be created by milling a corrugated metallic ridge.

Surface plasmon properties can be engineered via geometrical structuring.

Abstract

We demonstrate that the introduction of a subwavelength periodic modulation into a metallic structure strongly modifies the guiding characteristics of the surface plasmon modes supported by the system. Moreover, it is also shown how a new type of a tightly confined surface plasmon polariton mode can be created by just milling a periodic corrugation into a metallic ridge placed on top of a metal surface.