Causality and electromagnetic properties of active media Page 1 Causality and
electromagnetic properties of active media Bertil Nistad and Johannes Skaar Department of …

The analysis of wave propagation in linear, passive media is usually done by considering a
single real frequency (the monochromatic limit) and also often a single plane-wave …

A negative‐phase‐velocity condition derived by Depine and Lakhtakia (Microwave Opt
Technol Lett 41 (2004) 315–317) for isotropic, homogeneous, passive, dielectric‐magnetic …

We resolve the existing controversy concerning the selection of the sign of the normal-to-the-
interface component of the wave vector k_z of an electromagnetic wave in an active (gain) …

Three definitions of a refractive index that differ in the meaning of its real part are considered
for a homogeneous isotropic medium. The signs of wave characteristics (a refractive index …

Two choices are possible for the refractive index of a linear, homogeneous, isotropic, active,
dielectric material. Either of the choices is adequate for obtaining frequency-domain …

A planewave incident on an active etalon with net roundtrip gain may be expected to diverge
in field amplitude, yet applying the Fresnel formalism to Maxwell's equations admits a …

Metamaterials are artificially designed composite materials which can exhibit unique and
unusual properties such as the negative refractive index, negative phase velocity, etc. The …

Для однородной изотропной среды с комплексными эффективными материальными
параметрами рассмотрены три определения показателя преломления …

Fourier-Laplace analysis of gain media predicts the existence of novel types of media. In
particular it predicts the existence of media refracting positively and negatively at the same …