title: Generalization of electromagnetic scattering by charged grains through incorporation of interband and intraband effects.
abstract: Scattering of electromagnetic radiation by electrically charged spherical particles is treated theoretically. A generalization of the approach is performed by incorporating both intraband and interband effects, while a new oscillatory term corresponding to the classical dispersion theory and the semi-quantum approach is considered. It is shown through a set of numerical experiments that interband effects may reduce the amplitude of resonant peaks for scattering, Q(sca), and absorption, Q(abs), and cause a shift of peak positions to longer wavelengths. In general, the resonant features due to interband and intraband effects can occur at different frequencies; thus, both together may result in qualitatively and quantitatively new optical signatures of electrically charged particles. This is a motivating factor for experimentalists who can use the particles as targeted probes, for example, in mapping the electric fields in different media based on scattering and/or absorption properties of electrified particulate systems.
authors.forename: Jozef
authors.initials: J
authors.lastname: Klačka
authors.forename: Miroslav
authors.initials: M
authors.lastname: Kocifaj
authors.forename: František
authors.initials: F
authors.lastname: Kundracik
authors.forename: Gorden
authors.initials: G
authors.lastname: Videen
authors.forename: Igor
authors.initials: I
authors.lastname: Kohút