Finite element method for accurate 3D simulation of plasmonic waveguides

TL;DR

This paper presents a finite element method for precise 3D simulation of plasmonic waveguides, focusing on optical properties relevant for plasmon lasers, validated through numerical convergence tests.

Contribution

It introduces a comprehensive finite element approach with multiple solvers for accurate modeling of finite-length plasmonic structures.

Findings

Numerical convergence of the simulation methods is demonstrated.

The approach effectively models optical properties of hybrid plasmonic waveguides.

The methods are suitable for designing plasmonic laser components.

Abstract

Optical properties of hybrid plasmonic waveguides and of low-Q cavities, formed by waveguides of finite length are investigated numerically. These structures are of interest as building-blocks of plasmon lasers. We use a time-harmonic finite-element package including a propagation-mode solver, a resonance-mode solver and a scattering solver for studying various properties of the system. Numerical convergence of all used methods is demonstrated.