Direct evidence of negative refraction at media with negative \epsilon and \mu

TL;DR

This paper provides direct evidence from Maxwell equations that negative refraction occurs at interfaces with media having negative permittivity and permeability, confirming theoretical predictions without relying on causality or loss assumptions.

Contribution

It demonstrates that negative refraction can be derived directly from Maxwell equations at interfaces with negative  and , without additional assumptions.

Findings

Negative refraction is directly deducible from Maxwell equations.

The effect occurs at interfaces with media having negative  and .

The analysis does not depend on causality or loss considerations.

Abstract

We analyze wave scattering by an interface between a positive refractive index medium and a Left-Handed Material. We show that the negative refraction effect can be deduced directly from Maxwell equations, without references to causality or losses.