Optimization of loss and gain multilayers for reducing the scattering of a perfect conducting cylinder

• Published in: Chinese physics B Vol. 25; no. 7; pp. 209 - 213
• Main Author: 余振中 赵国树 孙罡 司海飞 杨忠
• Format: Journal Article
• Language: English
• Published: 01.07.2016
• Subjects: 增益损失; 多层膜; 导体柱; 材料隐形; 电磁散射; 等离子体材料; 覆盖优化; 高损耗
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/25/7/074101

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.