FOCUSING OF ELECTROMAGNETIC WAVE FROM HYPERBOLIC LENS INTO A UNIAXIAL CRYSTAL WITH AN ARBITRARY ORIENTATION OF THE OPTICAL AXIS IN THE PRESENCE OF ABERRATIONS

We derive integral representations suitable for studying the focusing of electromagnetic waves through a symmetrically hyperbolic focusing lens into uniaxial crystal in the presence of cylindrical and coma aberrations using Maslovʹs method. The uniaxial crystal used is the negative crystal LiNbO3. Numerical computations are made to obtain the results for focused fields inside negative uniaxial crystal with several different orientations of the optical axis in the plane of incidence. The effects of aberrations inside uniaxial crystal and isotropic medium are also noted. The results are compared with those obtained by Kirchhoff-Huygens integral and Maslovʹs method which are in good agreement.