title: Spectral domain method for the electromagnetic scattering by a buried sphere.
abstract: A rigorous method to analyze the electromagnetic scattering of an elliptically polarized plane wave by a sphere buried in a dielectric half-space, is presented. The electric field components of the incident and the scattered monochromatic plane waves are expanded in series of vectorial spherical harmonics, with unknown expansion coefficients. The scattered-reflected and scattered-transmitted fields are computed by exploiting the plane-wave spectrum of the scattered field, considering the reflection and transmission of each elementary plane wave by the interface. The boundary-condition imposition leads to a linear system that returns the unknown coefficients of the scattered field. To achieve a numerical solution, a code has been implemented, and a truncation criterion for the involved series has been proposed. Comparisons with the literature and simulations performed with a commercial software are presented. A generalization of the method to the case of a short pulse scattered by a buried sphere is presented, taking into account the dispersive properties of the involved media.
authors.affiliation: Department of Information Engineering, Electronics and Telecommunications, La Sapienza University of Rome, Roma 00184, Italy.
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Frezza
authors.forename: Fabio
authors.initials: F
authors.lastname: Mangini
authors.forename: Lara
authors.initials: L
authors.lastname: Pajewski
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Schettini
authors.forename: Nicola
authors.initials: N
authors.lastname: Tedeschi