Method for Retrieval of Electromagnetic Properties of Inhomogeneous Reciprocal Chiral Metamaterials

We have proposed an extraction algorithm which takes into account of coupling phenomenon for determining electromagnetic properties of inhomogeneous reciprocal chiral metamaterials (CMMs). We first obtained recursive reflection and transmission coefficients for right-hand and left-hand circularly polarized plane waves and then derived the expressions of refractive indices, wave impedance, and chirality parameter of a CMM slab using these recursive coefficients. We examined a three-layer inhomogeneous CMM structure composed of U-shape and crescent-shape metamaterial (MM) slabs and retrieved electromagnetic properties of U-shaped CMM slab. Finally, we considered the effect of noise added into transmission coefficient to evaluate the robustness of our method against noise.