Subcell Method for Modeling Metallic Resonators in Metamaterials
نویسندگان
چکیده
This paper describes a subcell modeling technique for metallic resonators where the actual metal traces are replaced by a thin wire having equivalent magnetic and electric radii, as well as an impedance per unit length. The formulas for these quantities in the case of rectangular traces are given. In addition, the gap of a split-ring resonator is replaced by a lumped load. The response of the resonator can then be modeled using thin-wire algorithms in an integral equation code. It is demonstrated that the number of unknowns and runtime can be reduced by factors of a thousand using the subcell models. This is particularly important in cases where metamaterial designs with tapered properties are encountered and periodic boundary conditions are not applicable, because with this simplification larger numbers of resonator cells can be handled.
منابع مشابه
Theory of pump-probe experiments of metallic metamaterials coupled to a gain medium.
We establish a new approach for pump-probe simulations of metallic metamaterials coupled to the gain materials. It is of vital importance to understand the mechanism of the coupling of metamaterials with the gain medium. Using a four-level gain system, we have studied light amplification of arrays of metallic split-ring resonators with a gain layer underneath. We find that the differential tran...
متن کاملModeling of Complex Rf/wireless Structures Using Computationally Optimized Time-domain Techniques
The modeling of RF integrated structures with fine metallic details using time-domain simulators is addressed. The key features identified as difficulties in modeling metallic structures in these techniques are dielectric and metal loss and complexity of geometry. A method to model loss that involves the use of a quasi-static simulator to identify correction factors that can be applied to a tim...
متن کاملFano resonances in THz metamaterials composed of continuous metallic wires and split ring resonators.
We demonstrate theoretically and experimentally that Fano resonances can be obtained in terahertz metamaterials that are composed of periodic continuous metallic wires dressed with periodic split ring resonators. An asymmetric Fano lineshape has been found in a narrow frequency range of the transmission curve. By using a transmission line combined with lumped element model, we are able to not o...
متن کاملStacked-and-drawn metamaterials with magnetic resonances in the terahertz range.
We present a novel method for producing drawn metamaterials containing slotted metallic cylinder resonators, possessing strong magnetic resonances in the terahertz range. The resulting structures are either spooled to produce a 2-dimensional metamaterial monolayer, or stacked to produce three-dimensional multi-layered metamaterials. We experimentally investigate the effects of the resonator siz...
متن کاملMechanism of the metallic metamaterials coupled to the gain material.
We present evidence of strong coupling between the gain material and the metallic metamaterials. It is of vital importance to understand the mechanism of the coupling of metamaterials with the gain medium. Using a four-level gain system, the numerical pump-probe experiments are performed in several configurations (split-ring resonators (SRRs), inverse SRRs and fishnets) of metamaterials, demons...
متن کامل