FOCUSING, POWER TUNNELING AND REJECTION FROM CHIRAL AND/OR CHIRAL NIHILITY/NIHILITY METAMATERIALS LAYERS
2013
Focusing of electromagnetic plane wave from a large paraboloidal re∞ector, composed of layers of chiral and/or chiral nihility metamaterials, has been studied using Maslov's method. As a flrst step, the transmission and re∞ection of electromagnetic plane wave from two parallel layers of chiral and/or chiral nihility metamaterials are investigated using transfer matrix method. The efiects of change of angle of incidence, chirality parameters and impedances 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 re∞ection from a perfect electric conductor backed chiral layer and nihility backed chiral layer, respectively. Results of re∞ection from parallel layers have been utilized to study focusing from a large paraboloidal re∞ector. The present study, on focusing from a paraboloidal re∞ector, not only unifles already published work by various researchers but also provides better understanding of the problem.
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