Nonlinear Plasma Dipole Oscillations in Spheroidal Metal Nanoparticles

TL;DR

This paper develops a theoretical model for nonlinear plasma dipole oscillations in spheroidal metal nanoparticles under laser excitation, providing approximate analytic expressions for the dipole moment aligned with the spheroid axis.

Contribution

It introduces a new theoretical framework for nonlinear plasma oscillations in spheroidal nanoparticles, including approximate analytic solutions.

Findings

Derived cubic-term approximate expressions for dipole moments.

Analyzed oscillations with laser field along spheroid axis.

Enhanced understanding of nonlinear plasma behavior in nanoparticles.

Abstract

The theory of nonlinear dipole plasma oscillations generated in a metal spheroidal nanoparticle by a laser-wave field has been developed. Approximate (to within the cubic term) analytic expressions for the nanoparticle dipole moment have been obtained in the case where the laser field is oriented along the spheroid rotation axis.