Figure 4. Gap dependence of the electric field distribution and absorption.

Electric field intensity distribution for RCP (|E₊|²) and LCP (|E₋|²), the difference of the electric field (|E₊|² − |E₋|²) and horizontal electric field amplitude E_y for RCP and LCP in the CDZM with g equal to (a) 1.0 mm and (b) 0.1 mm at the resonance frequency f₁. Electric fields are confined in the region denoted as C_m and for g = 1.0 mm whereas the electric fields are more localized around the gap for g = 0.1 mm reducing the electric fields at C_m and significantly. As a result, the difference of the electric field (|E₊|² − |E₋|²) for RCP and LCP waves reduces significantly. (c) Absorption A₊ (A₋) for RCP (LCP) and the absorption difference |ΔA| as a function of the gap width g at f₁ (top) and at f₂ (middle) and difference of the average field stored in the Teflon substrate for RCP and LCP as a function of g (bottom).