Publication

HELIOS: A Surface Integral Equation Framework for Light Scattering in Stratified Backgrounds

2026

Abstract

In this work, we introduce HomogEneous and Layered medIa Optical Scattering (HELIOS), a surface integral equation solver designed to model electromagnetic scattering by nanostructures within stratified media. Our method utilizes the layered medium dyadic Green's tensor, where Sommerfeld integrals are computed using stable contour integration techniques. By adopting the matrix-friendly formulation alongside a tabulation-interpolation strategy, the implementation achieves both accuracy and numerical stability, even for objects touching or intersecting layer boundaries. The capabilities of the solver are demonstrated through the analysis of a gold dimer situated at an air-SiO2 interface. The resulting optical cross sections and near-field map confirm the accuracy of HELIOS for simulating light-matter interactions in layered backgrounds.

Official source

https://infoscience.epfl.ch/entities/publication/a2cb1b1f-9f3e-4a84-a6ec-664d04206cb6

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2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/a2cb1b1f-9f3e-4a84-a6ec-664d04206cb6

About this result

Related concepts (32)

Scattering

Scattering is a term used in physics to describe a wide range of physical processes where moving particles or radiation of some form, such as light or sound, are forced to deviate from a straight trajectory by localized non-uniformities (including particles and radiation) in the medium through which they pass. In conventional use, this also includes deviation of reflected radiation from the angle predicted by the law of reflection.

Rayleigh scattering

Rayleigh scattering (ˈreɪli ), named after the 19th-century British physicist Lord Rayleigh (John William Strutt), is the predominantly elastic scattering of light or other electromagnetic radiation by particles much smaller than the wavelength of the radiation. For light frequencies well below the resonance frequency of the scattering particle (normal dispersion regime), the amount of scattering is inversely proportional to the fourth power of the wavelength. Rayleigh scattering results from the electric polarizability of the particles.

Computational electromagnetics

Computational electromagnetics (CEM), computational electrodynamics or electromagnetic modeling is the process of modeling the interaction of electromagnetic fields with physical objects and the environment. It typically involves using computer programs to compute approximate solutions to Maxwell's equations to calculate antenna performance, electromagnetic compatibility, radar cross section and electromagnetic wave propagation when not in free space.

Related publications (32)

HELIOS: A Surface Integral Equation Framework for Light Scattering in Stratified Backgrounds

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