Optimization of loss and gain multilayers for reducing the scattering of a perfect conducting cylinder |
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Institution: | School of Intelligence Science and Control Engineering, Jinling Institute of Technology, Nanjing 211169, China |
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Abstract: | Reduction of electromagnetic scattering from a conducting cylinder could be achieved by covering it with optimized multilayers of normal dielectric and plasmonic material. The plasmonic material with intrinsic losses could degrade the cloaking effect. Using a genetic algorithm, we present the optimized design of loss and gain multilayers for reduction of the scattering from a perfect conducting cylinder. This multilayered structure is theoretically and numerically analyzed when the plasmonic material with low loss and high loss respectively is considered. We demonstrate by full-wave simulation that the optimized nonmagnetic gain-loss design can greatly compensate the decreased cloaking effect caused by loss material,which facilitates the realization of practical electromagnetic cloaking, especially in the optical range. |
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Keywords: | transformation optics invisibility cloak metamaterial |
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