Resonance structure of the scattering and extinction cross sections in the Mie problem for biisotropic sphere

The extinction and scattering cross sections for the case of the plane monochromatic circularly polarized electromagnetic wave scattered by a biisotropic sphere embedded in a biisotropic medium are calculated on the basis of the exact solution of the Mie problem. Scattering and extinction cross section dependences on the ratio of the sphere radius to the wavelength are analyzed numerically. The resonance structure of the scattering and extinction cross sections is revealed. These cross sections have narrow and very narrow peaks which are superimposed upon slowly oscillating diffraction background.