This work deals with some aspects of the resonant scattering of electromagnetic waves by a metallic sphere covered by a dielectric layer, in the weak-absorption approximation. We carry out a geometrical optics treatment of the scattering and develop semiclassical formulas to determine the positions and widths of the system resonances. In addition, we show that the mean lifetime of broad resonances is strongly dependent on the polarization of the incident light.
© 2003 Optical Society of America
Original Manuscript: July 5, 2002
Revised Manuscript: October 22, 2002
Manuscript Accepted: October 25, 2002
Published: March 1, 2003
Túlio M. Bambino, Ana Maria S. Breitschaft, Valmar C. Barbosa, and Luiz G. Guimarães, "Application of semiclassical and geometrical optics theories to resonant modes of a coated sphere," J. Opt. Soc. Am. A 20, 489-498 (2003)