On the electromagnetic properties of active media

Abstract

Several results concerning active media or metamaterials are proved and discussed. In particular, we consider the permittivity, permeability, wave vector, and refractive index, and discuss stability, refraction, gain, and fundamental limitations resulting from causality.

References in corpus (2)

• Active metamaterials: sign of refraction index and gain-assisted dispersion management
• On the refractive index for a nonmagnetic two-component medium: resolution of a controversy

Cited by in corpus (2)

• The refractive index and wave vector in passive or active media
• The perfect lens on a finite bandwidth