Fig. 4 Idea for implementation of LC circuits based on waveguide metatronics using only materials with positive permittivities. Idea for implementation.

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Fig. 4 Idea for implementation of LC circuits based on waveguide metatronics using only materials with positive permittivities. Idea for implementation of LC circuits based on waveguide metatronics using only materials with positive permittivities. (A) 3D view of the simulation setup. The system is composed of a rectangular PEC waveguide with a TE10 incident mode propagating slightly above its cutoff. The LC circuit (shown in green) is marked by a blue circle. (B and C) Top views and associated circuit diagrams of the series (B) and parallel (C) LC circuits all with only materials with positive dielectric. The permittivities of the capacitor (εact = 19 and εC,eff = 8) and inductor (εact = 3 and εL,eff = − 8) elements are selected so that the effective LC circuits operate at resonance ωL = 1/(ωC). (D and E) Color map of the simulation results for the electric field magnitude distributions for the series (D) and parallel (E) LC circuits on the middle plane in (A) (z = a/2). The numerical simulations demonstrate that, as expected, the series LC circuit responds as a short circuit that blocks the propagation of the incident wave, whereas the parallel LC circuit responds as an open circuit with no significant impact on the propagation of the incident wave. Yue Li et al. Sci Adv 2016;2:e1501790 Copyright © 2016, The Authors