CLEO®/europe-EQEC 2009 electromagnetic resonances in nanoparticles of arbitrary shape

This paper considers a metallic or dielectric particles with dimension of the order of the wavelength of the incident field or smaller so that that Maxwell´s macroscopic equations apply. The basis of classical Fano resonances, single molecule spectroscopy and many other effects is the strong variation of the interaction with electromagnetic energy as a function of wavelength. Mie theory provides an analytical description of such resonances for spheres; here, it was shown that this is a special case of a general geometrical explanation for resonances in Maxwell´s equations, which apply to all smooth isotropic particles.