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A freestanding planar NIM comprised of two Au metallic screens sandwiched between three layers of polyimide was optimized to have low loss and an impedance match to free space. Constraints were incorporated into the optimization so that the result is compatible with our fabrication scheme. Measured material properties were included in the full- wave electromagnetic simulation to ensure that the predicted...
Two planar multilayer metallo-dielectric metamaterials with two and four metallic screens, respectively, were optimized by a genetic algorithm to have a zero refractive index and an impedance matched to free space in the mid-IR. The structure geometries were constrained to make fabrication easier and a freestanding device possible. The full- wave simulation predicts excellent performance at the design...
Two planar multilayer negative/zero/unity index metamaterials using cascaded modified fishnet metal screens were considered. The structures were optimized by a GA to have refractive indexes equal to -1, 0, and 1 at predetermined frequencies as well as low absorption loss and an effective impedance matched to free space. The dielectric layers were constrained so that they could be fabricated from existing...
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