A surface-scattering model satisfying energy conservation and reciprocity

TL;DR

This paper introduces a surface scattering model based on particle layer analysis that inherently satisfies energy conservation and reciprocity, ensuring accuracy across all frequency ranges.

Contribution

The model is novel in satisfying both energy conservation and reciprocity principles simultaneously, unlike previous models based on Kirchhoff's approximation or perturbation theory.

Findings

Model satisfies energy conservation and reciprocity in all frequency ranges.

Accounts for substrate absorption induced by particles.

Does not include near-field particle interactions.

Abstract

In order for surface scattering models to be accurate they must necessarily satisfy energy conservation and reciprocity principles. Roughness scattering models based on Kirchoff's approximation or perturbation theory do not satisfy these criteria in all frequency ranges. Here we present a surface scattering model based on analysis of scattering from a layer of particles on top of a substrate in the dipole approximation which satisfies both energy conservation and reciprocity and is thus accurate in all frequency ranges. The model takes into account the absorption in the substrate induced by the particles but does not take into account the near-field interactions between the particles.