Propagation of light from dipole source and generalization of Fresnel-Kirchhoff integral

Abstract

© 2018 Elsevier GmbH The elementary system which can emit light is a dipole. Theoretical method of light propagation from point like dipole source is presented in this paper. The propagation is considered through two media divided by 3D arbitrary surface. Orientation of new formed dipole on surface segment is determined according to the refraction of incident wave-front electric field strength on boundary surface. Generalized formulation of Fresnel-Kirchhoff integral is derived for elementary dipole as a source and arbitrary surface dividing two media with arbitrary refraction indexes. This model shows that distribution of light depends on orientation of primary point like dipole source and curvature of 3D boundary surface. The model presented here can be used for extended surface or volume source of light, where each point of the source is point like dipole. In this way, the propagation of light wavefront could be modeled.