Surface waves on metal-dielectric boundaries on the frequency of $\omega_{pl}$

TL;DR

This paper investigates surface optical plasmons at metal-dielectric boundaries near the plasma frequency, exploring their existence on various nanostructures and implications for advancing nanophotonics into shorter wavelengths.

Contribution

It analyzes high-frequency surface plasmons on different shapes, revealing their existence beyond single surfaces and potential for nanophotonics applications at shorter wavelengths.

Findings

Surface plasmons exist on thin films, cylinders, and spheres at frequencies near $ ext{ω}_{pl}$.

These plasmons do not exist on a single surface.

Application potential for nanophotonics at wavelengths around 140 nm for silver.

Abstract

Surface optical plasmons on metal-dielectric boundaries of various shapes are studied. The study features by the exploration of plasmons of the frequency that is larger than $\omega_{pl}/\sqrt{2}$ and approximately equal to $\omega _{pl}$. These plasmons exist on thin films, thin cylinders, and on spheres. Such a plasmon does not exist on a single surface. For applications the use of plasmons of the ~$\omega_{pl}$ frequency means the promotion of nanophotonics devices into a short wavelength range. For Ag this means the promotion to the wavelength of 140 nm.