Espalhamento de luz por materiais com simetria PT

Abstract

The objective of this dissertation is to analyze, with a certain level of detail, the scattering of monochromatic electromagnetic radiation by an isotropic and linear dielectric material having PT symmetry in the Born approximation. Studying the light scattered by a specific material can give us useful information about the nature of the material. Thus, we verify how light scattering behaves in a material that has PT symmetry and how the presence of gain and loss within the material can affect the spectral density of the scattered field. Spectral density is a quantity that can be measured directly in the laboratory. We verified that, for certain gain and loss distributions, the scattered field direction can be varied without changing the scatterer geometry. The non-Hermitian character of the refractive index of the scatterer is also reflected in the scattered intensity pattern, which now becomes asymmetric with respect to the scattering angle.