Focusing, power tunneling and rejection from chiral and/or chiral nihility/nihility metamaterials layers

Abstract

Focusing of electromagnetic plane wave from a large paraboloidal reflector, composed of layers of chiral and/or chiral nihility metamaterials, hasbeen studied using Maslov's method. As a first step, the transmission and reflection of electromagnetic plane wave from two parallel layers of chiral and/or chiral nihility metamaterials are investigated using transfer matrix method. The e®ects of change of angle of incidence, chirality parameters andimpedances of layers are noted and discussed. Special cases by taking extreme values of permittivity of second layer, while assuming value of corresponding chirality equal to zero, are also obtained for validating the methodology. These special cases are equivalent to reflection from a perfect electric conductor backed chiral layer and nihility backed chiral layer, respectively. Results of reflection from parallel layers have been utilized to studyfocusing from a large paraboloidal reflector. The present study, on focusingfrom a paraboloidal reflector, not only unifies already published work by various researchers but also provides better understanding of the problem.