Reflection Properties Of Isotropic-Pseudochiral Interfaces

Abstract

In this paper we consider the trainsmission and reflection properties of a planar isotropic-pseudochiral interface under excitation condition of planar waves. The development of the solution is obtained by using the conventional boundary conditions in the transverse plane of the structure with respect to the normal axis of the interface plane. Several interesting characteristics of the reflected and transmitted plane waves have been obtained depending on the constitutive parameters and the pseudochirality admittance. Introduction and statement of the! electromagnetic problem The study of electromagnetic field propagating in complex (artificial) media, such as biisotropic chiral, anisotropic uniaxial, biaxial and gyrotropic ones, is a stimulating research topic for itis potential applications, namely in optics and millimeter wave frequency range. This is reflected in an increasing demand of rigorous theoretical models and efficient numerical tools, working at higher and higher frequencies for practical structures, as the planar integrated configuration with a dielectric slab, generally terminated on a ground plane or on an other unbounded medium. Therefore a first interesting problem is connected with the absorbing or reflecting properties of planar interfaces. Recently [l], a new type of synthetic material, called R (or pseudochiral) medium has been brought to the attention of the applied research. R medium is realized on a host isotropic material, where planar conducting microstructures, shaped as the Greek letter Q and with their stems oriented along the same axis, are embedded (Fig.1). K s Fig.1 Planar conducting microstructures of a medium. A magneto-electric coupling effect, due to the shape of the microstructures, is characteristic of such a mediurn and can be described by the appropriate 2-constitutive relations: D=E.E +goH and B=3;*E + 11.H; where E = + p y y ~ c ~ ~ , = & are (3x3) diagonal biaxial tensors, while z and have the expressions: z =-jp,,R,y^x ̂ P = jpyyRcxy. Rc is the pseudochiral admittance. Therefore besides the classical Eii, Pjj parameters the pseudochiral medium has an additional degree of freedom, given by a,. A h