The Design of Random Surfaces with Specified Scattering Properties: Surfaces that Suppress Leakage

TL;DR

This paper introduces a method to design one-dimensional random metal surfaces that effectively suppress leakage of surface plasmon polaritons into volume electromagnetic waves, verified through perturbative and numerical simulations.

Contribution

A novel approach for generating random metal surfaces with tailored scattering properties to suppress leakage of surface waves.

Findings

Surfaces generated by the method suppress leakage effectively.

Perturbative and numerical simulations confirm leakage suppression.

The method provides a new way to control surface wave propagation.

Abstract

We present a method for generating a one-dimensional random metal surface of finite length L that suppresses leakage, i.e. the roughness-induced conversion of a surface plasmon polariton propagating on it into volume electromagnetic waves in the vacuum above the surface. Perturbative and numerical simulation calculations carried out for surfaces generated in this way show that they indeed suppress leakage.