# Bruggeman Approach for Isotropic Chiral Mixtures Revisited

## TL;DR

This paper compares two interpretations of the Bruggeman homogenization approach for isotropic chiral mixtures, revealing that they produce different results due to their treatment of local fields, with implications for material modeling.

## Contribution

It clarifies the differences between two interpretations of the Bruggeman approach and their impact on homogenization results for isotropic chiral mixtures.

## Key findings

- Standard interpretation aligns with average-polarizability-density approach
- Recent interpretation results in null-excess-polarization approach
- Differences stem from treatment of local fields

## Abstract

Two interpretations of the Bruggeman approach for the homogenization of isotropic chiral mixtures are shown to lead to different results. Whereas the standard interpretation is shown to yield the average-polarizability-density approach, a recent interpretation turns out to deliver a null-excess-polarization approach. The difference between the two interpretations arises from differing treatments of the local field