Nanophotonic resonance modes with the nanobem toolbox

TL;DR

Nanobem is a Matlab toolbox designed for computing resonance modes in nanophotonic systems using a boundary element method and contour integral techniques, facilitating the analysis of electromagnetic resonances.

Contribution

The paper introduces a Matlab toolbox that implements a boundary element method with contour integral techniques for calculating nanophotonic resonance modes.

Findings

Successfully computes resonance modes for small to intermediate systems.

Uses Galerkin boundary element method with Raviart-Thomas shape elements.

Employs Beyn's contour integral method for resonance mode calculation.

Abstract

Nanobem is a Matlab toolbox for the solution of Maxwell's equations for nanophotonic systems and the computation of resonance modes, sometimes also referred to as quasinormal modes or resonance states. It is based on a Galerkin scheme for the boundary element method, using Raviart-Thomas shape elements for the representation of the tangential electromagnetic fields at the particle boundary. The toolbox is written in an object-oriented manner with the focus on clarity rather than speed, and has been developed and tested for small to intermediate problems with a few thousand boundary elements. The computation of the resonance modes uses the contour integral method of Beyn.