Numerical study of the scattered electromagnetic field inside a hollow dielectric cylinder. 1:Scattering of a single beam.

The field structure and the total energy inside a thin hollow lossless dielectric cylinder have been studied numerically for normal incidence of collimated TM waves. The dependence of these quantities on the optical thickness and the inner radius of the cylinder and on the refractive index of the cylinder material has been discussed. It has been shown that optimization of the various parameters may lead to a localized peak of high relative irradiance and also a high concentration of energy inside the cylinder.